Other air troubleshooting

Amana air conditioner troubleshooting

By consulting the troubleshooting tables below you may be able not only to identify the Amana air conditioner issue, but to resolve it, too. There’s a list of the most common problems provided with expert explanations of the possible causes. Sometimes diagnosing and repairing an air conditioner can be very complicated, yet chances are that in your case there’s no major issue and you won’t need professional help.

Amana RS4100004 air troubleshooting

Symptom	Possible Causes	Corrective Action
Fan motor will not operate.	No power supplied to unit.	Check fuse box/circuit breaker for blown fuse or tripped breaker. Replace/reset.
	Power supply cord faulty.	Check power cord for opens. Replace cord if faulty.
	Wire(s) disconnected or loose.	Ensure all connections are tight and secure.
	Fan motor capacitor faulty.	Check capacitor for open/ short. Replace if faulty. NOTE: Discharge capacitor before testing.
	Fan motor faulty.	Check fan motor windings for shorts/opens. Replace if faulty.
	Electronic control faulty.	Ensure all control connections are tight and secure. Check control for proper operation. Replace if faulty. NOTE: Eliminate all other possible causes before replacing electronic control.
Fan blade will not rotate.	Fan hitting shroud or blower wheel hitting scroll.	Check fan blade/blower wheel for proper alignment on motor shaft. Reposition if necessary. Check fan motor for proper position, ensure mounting nuts/bracket tight and secure.
Fan motor operates intermittently.	Unit in ENERGY SAVER mode.	Fan only operates when compressor is on, or to sample room temperature when compressor is off.
	Wire(s) disconnected or loose.	Ensure all connections are tight and secure. Correct as required.
	Cycling on motor protector.	Replace motor.
Fan motor operates intermittently.	Electronic control faulty.	Ensure all control connections are tight and secure. Check control for proper operation. Replace if faulty. NOTE: Eliminate all other possible causes before replacing electronic control.
Fan motor noisy.	Outside coil fan blade or inside coil blower wheel loose or improperly aligned.	Check fan blade/blower wheel for proper position. Reposition if necessary. Ensure hardware attaching fan blade/blower wheel to motor shaft is tight. Tighten if loose: replace if stripped.
	Worn fan motor bearings.	Check bearings for wear/loss of lubricant. Replace motor if either condition found.
	Fan motor mounting hardware/bracket loose or grommets worn (if applicable).	Check mounting bolts/bracket for tightness. Tighten if necessary. Inspect grommets for wear. Replace if necessary.
Compressor does not run, fan motor operates normally.	Compressor lockout.	Lockout feature delays compressor start up for 3-4 minutes under certain conditions
	Wire(s) disconnected or loose.	Ensure all connections are tight and secure. Correct as required.
	Compressor motor capacitor faulty.	Check capacitor for open/ short. Replace if faulty. NOTE: Discharge capacitor before testing.
	Compressor faulty.	Check compressor motor windings for opens/shorts. Check compressor seals. Perform compressor direct wiring test. Replace compressor if faulty.
Compressor does not run, fan motor operates normally.	Overload protector open.	Check protector for continuity. If open, replace. NOTE: Ensure compressor/ overload are below trip temperature before testing.
	Electronic control faulty.	Ensure all control connections are tight and secure. Check control for proper operation. Replace if faulty. NOTE: Eliminate all other possible causes before replacing electronic control.
Compressor cycles on and off.	Wire(s) disconnected or loose.	Ensure all connections are tight and secure. Correct as required.
	Supply voltage out of specification.	Check input voltage for proper levels. Take appropriate action if voltage levels out of specification.
	Overload protector open.	Check protector for continuity. If open, replace. NOTE: Ensure compressor/ overload are below trip temperature before testing.
	Fan motor faulty.	Check fan motor for proper operation. Replace if faulty.
	Restricted air flow.	Inspect air filter, indoor/ outdoor coil for dirt. Clean as required. Check fins on coils for damage. Straighten fins if bent, attempt other repairs as necessary. Replace faulty coil if repairs cannot be made.
	Compressor motor capacitor faulty.	Check capacitor for open/ short. Replace if faulty. NOTE: Discharge capacitor before testing.
	Sealed refrigerant system fault.	Test sealed system for proper charge, leaks, and restrictions. Repair as required.
Insufficient cooling.	Low refrigerant charge.	Test sealed system for proper charge. Ensure system is free of leaks. Repair as required.
	Restricted air flow.	Inspect air filter, indoor/ outdoor coil for dirt. Clean as required. Check fins on coils for damage. Straighten fins if bent, attempt other repairs as necessary. Replace faulty coil if repairs cannot be made.
	Vent control in exhaust position/ vent door stuck open.	Ensure vent control in closed position when unit is cooling (consumer education). Check vent door for proper operation. Replace/repair as required.
	Unit undersized for area/room.	Reduce area being cooled or replace unit with larger capacity model.
Excessive noise.	Outside coil fan blade or inside coil blower wheel loose or improperly aligned.	Check fan blade/blower wheel for proper position. Reposition if necessary. Ensure hardware attaching fan blade/blower wheel to motor shaft is tight. Tighten if loose, replace if stripped.
	Compressor mounting hardware loose or grommets worn.	Check mounting bolts for tightness. Tighten if necessary. Inspect grommets for wear. Replace if necessary.
	Free parts, loose screws causing or allowing excessive vibration.	Inspect unit for parts that may have worked free, loose/ missing screws, other problems that may cause excessive vibration. Repair as required.
	Worn fan motor bearings.	Check bearings for wear/loss of lubricant. Replace motor if either condition is found.
Excessive noise.	Fan motor mounting hardware/bracket loose or grommets worn (if applicable).	Check mounting bolts/bracket for tightness. Tighten if necessary. Inspect grommets for wear. Replace if necessary.
	Copper tubing improperly dressed or routed.	Inspect copper tubing for excessive vibration. Secure tubing as required.
	Compressor internal noise.	Inspect compressor for proper operation. Replace as required.
Excessive condensate in base pan.	Unit operating under excessive humidity conditions.	Remove condensate drain plug in base pan. NOTE: Removal of plug may result in slight decrease in cooling efficiency. Removal not recommended if excessive humidity is temporary and infrequent condition for area.
No cooling.	Low refrigerant charge or leak in sealed system.	Test sealed system for proper charge. Ensure system is free of leaks. Repair as required.
	Blockage (restriction) in sealed system.	Evacuate sealed system. Remove blockage, recharge.
	Compressor faulty.	Check compressor motor windings for open shorts. Check compressor seals. Perform compressor direct wiring test. Replace compressor if faulty.
	Electronic control faulty.	Ensure all control connections are tight and secure. Check control for proper operation. Replace if faulty. NOTE: Eliminate all other possible causes before replacing electronic control.
Wattage slowly decreases below minimum specification.	Undercharged, restricted strainer or plugged capillary tube.	Test sealed system for proper charge. Ensure system is free of leaks/blockage. Repair as required. Evacuate/recharge sealed system.
Wattage decreases immediately.	No refrigerant. Compressor faulty.	Test sealed system for proper charge. Ensure system is free of leaks. Repair as required. Check compressor motor windings for open/shorts. Check compressor seals. Perform compressor direct wiring test. Replace compressor if faulty.
Wattage continuously high.	Refrigerant overcharge.	Test sealed system for proper charge. Repair as required.
Evaporator coil partially frosted.	System low on refrigerant. Restricted capillary tube. Insufficient air flow. Faulty fan motor	Test sealed system for proper charge. Ensure system is free of leaks. Repair as required. Replace capillary tube. Inspect air filter, indoor/ outdoor coil for dirt. Clean as required. Check fins on coils for damage. Straighten fins if bent, attempt other repairs as necessary. Replace faulty coil if repairs cannot be made. Check fan motor for proper operation. Replace if faulty.
Evaporator completely iced.	Low outside temperature. Restricted capillary tube. Insufficient air flow.	Turn unit off. (Consumer education). Replace capillary tube. Inspect air filter, indoor/ outdoor coil for dirt. Clean as required. Check fins on coils for damage. Straighten fins if bent, attempt other repairs as necessary. Replace faulty coil if repairs cannot be made.

Amana Quiet Zone 18M23TB air troubleshooting

Difficulty	Possible Cause	Suggested Solution
Air conditioner will not operate.	No power to unit.	Set fan control to position other than off.
		Confirm power cord is plugged in.
		Check fuse or circuit breaker.
Little or no cooling.	Compressor lockout on initial plug-in.	Wait 3 to 4 minutes and recheck compressor.
	Dirty air filter.	Clean air filter.
	Air conditioner undersized for application.	Check with dealer to determine proper unit capacity for application.
	Power interruption or changing unit settings.	Let fan run. Compressor will automatically restart in approximately 3 to 4 minutes.
Noisy unit.	Loose parts.	Tighten any loose parts.
	Weak building construction.	Provide additional support.
	Water hitting fan blade.	Normal in high humidity.
Mounting support cannot be installed.	Storm window frame has been installed into window.	Some models require the window sill to be adapted to accept the mounting support.
Odors in cooling.	Mold, mildew or algae formation on wet surfaces.	Place algaecide tablet in base pan.
Water in base pan.	Water in base pan is picked up by the fan blade and thrown onto the warm outdoor coil where the water then evaporates.	Normal in high humidity

Amana GSH13018 air troubleshooting

Symptom	Fault Description(s)	Possible Causes	Corrective Action	Cautions and Notes
- Motor rocks slightly when starting.	- This is normal start-up for variable speed motor.	—	—	—
- Motor won't start.	- No movement.	- Manual disconnect switch off or door switch open. - Blown fuse or circuit breaker. - 24 Vac wires miswired. - Unseated pins in wiring harness connectors. - Bad motor/control module. - Moisture present in motor or control module.	- Check 230 Vac power at motor. - Check low voltage (24 Vac R to C) at motor. - Check low voltage connections (G. Y. W. R. C) at motor. - Check for unseated pins in connectors on motor harness. - Test with a temporary jumper between R - G.	- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor. - Handle electronic motor/control with care.
	- Motor rocks, but won’t start.	- Loose motor mount. - Blower wheel not tight on motor shaft. - Bad motor/control module.	- Check for loose motor mount. - Make sure blower wheel is tight on shaft. - Perform motor/control replacement check. ECM motors only.	- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor. - Handle electronic motor/control with care.
- Motor oscillates up & down while being tested off of blower.	- It is normal for motor to oscillate with no load on shaft.	—	—	—
- Motor starts, but runs erratically.	- Varies up and down or intermittent.	- Variation in 230 Vac to motor. - Unseated pins in wiring harness connectors. - Erratic CFM command from "BK" terminal. - Improper thermostat connection or setting. - Moisture present in motor/control module.	- Check line voltage for variation or “sag". - Check low voltage connections (G. Y. W. R. C) at motor, unseated pins in motor harness connectors. - Check-out system controls - Thermostat. - Perform Moisture Check.	- Turn power OFF prior to repair.
	- "Hunts" or “puffs" at high CFM (speed).	- Incorrect or dirty filter(s). - Incorrect supply or return ductwork. - Incorrect blower speed setting.	- Does removing panel or filter reduce "puffing"? - Check/replace filter. - Check/correct duct restrictions. - Adjust to correct blower speed setting.	- Turn power OFF prior to repair.
	- Stays at low CFM despite system call for cool or heat CFM.	- 24 Vac wires misfired or loose. - "R" missing/not connected at motor. - Fan in delay mode.	- Check low voltage (Thermostat) wires and connections. - Verify fan is not in delay mode - wait until delay complete. - Perform motor/control replacement check. ECM motors only.	- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor. - Handle electronic motor/control with care.
- Motor starts, but runs erratically.	- Stays at high CFM.	- "R" missing/not connected at motor. - Fan in delay mode.	- Is fan in delay mode? - wait until delay time complete. - Perform motor/control replacement check. ECM motors only.	- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor. - Handle electronic motor/control with care.
	- Blower won't shut off.	- Current leakage from controls into G, Y, or W.	- Check for Triac switched testate or solid state relay.	- Turn power OFF prior to repair.
	- Air noise.	- High static creating high blower speed. - Incorrect supply or return ductwork. - Incorrect or dirty filter(s). - Incorrect blower speed setting.	- Check/replace filter. - Check/correct duct restrictions. - Adjust to correct blower speed setting.	- Turn power OFF prior to repair.
- Excessive noise.	- Noisy blower or cabinet.	- Loose blower housing, panels, etc. - High static creating high blower speed. - Air leaks in ductwork, cabinets, or panels.	- Check for loose blower housing, panels, etc. - Check for air whistling thru seams in ducts, cabinets or panels. - Check for cabinet/duct deformation.	- Turn power OFF prior to repair.
	- "Hunts" or "puffs" at high CFM (speed).	- High static creating high blower speed. - Incorrect or dirty filter(s). - Incorrect supply or return ductwork. - Incorrect blower speed setting.	- Does removing panel or filter reduce "puffing"? - Check/replace filter. - Check/correct duct restrictions. - Adjust to correct blower speed setting.	- Turn power OFF prior to repair.
- Evidence of Moisture.	- Motor failure or malfunction has occurred and moisture is present.	- Moisture in motor/control module.	- Replace motor and perform Moisture Check.	- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor. - Handle electronic motor/control with care.

Amana First Edition air troubleshooting

Problem	Possible Cause	Solution
Unit will not turn on.	• Power cord unplugged.	• Ensure power cord is firmly plugged into outlet.
	• Blown fuse or tripped circuit breaker.	• Replace blown fuse; reset tripped breaker.
	• Electrical power low (“brown out").	• Low voltage protection prevents operation if supply voltage drops below 103.5 VAC for 115 VAC units or 197 VAC for 208/230 VAC units. Contact local electric utility if supply voltage is low.
	• Electrical power outage.	• Contact local electric utility.
Unit does not adequately cool (or heat) area.	• Dirty air filter.	• Remove and clean air filter. NOTE: Do not operate air conditioner with filter removed.
	• Room or area not sealed.	• Close all doors and windows in area. Close all air vents and ducts in area.
	• Vent Control in EXHAUST position.	• Vent Control should be in NORMAL position whenever air conditioner is in cooling or heating mode.
	• Airflow to or from unit blocked.	• Remove any obstruction to airflow from air discharge vent or return air vent on unit.
	• Unit improperly sized for room or area.	• Reduce area being conditioned (close doors or otherwise isolate area).
	• Temperature control not properly set.	• Turn temperature control to more comfortable setting.
Mounting support cannot be installed.	• Window has storm window frame.	• Window frame can be modified or if storm window frame must be removed.
Odors in cooling.	• Formation of mold, mildew, or algae on wet surfaces.	• Clean unit thoroughly. • Place algaecide in base pan.
Odor in heating.	• Caused by dust accumulation; normal whenever heater is first used and when heater has not been used for a period of time.	• Odor will dissipate after heater cycles on and off several times.
Unit noisy.	• Unit improperly installed, causing vibration when operating.	• Review installation procedures. Ensure all mounting hardware is tight and secure.
	• Water noise whenever fan runs.	• Normal, especially during periods of high humidity.
	• Loose screws or parts.	• Remove chassis from outer case. Check for loose or missing screws. Tighten or replace as required.

American standard air conditioner troubleshooting

American Standard Company, Inc. is a world-renowned manufacturer of kitchen appliances and plumbing, air conditioning and control systems for different devices. In 2007, the company began producing exclusively climate control equipment and changed its name to Trane. Refer to the table below for troubleshooting of equipment of this brand.

Problem	Possible cause	Remedy
Insufficient heating or cooling	a. dirty filters	a. clean or replace
	b. air not circulating freely	b. check supply registers and return grills for blockage
	c. blocked outdoor coil	c. clear away leaves or other debris
Failure to operate	a. power off	a. make sure main switch is in ON position
	b. open circuit breaker or burned-out fuses	b. reset circuit breaker, or replace burned-out fuses
	c. improperly adjusted thermostat	c. check setting, adjust thermostat
No Heating or Cooling — Blower does not operate	Blower door removed or ajar	Close door securely to restore power to blower
Unusual Noise		Call your local servicer

Aux Air Conditioner Troubleshooting

If you are the owner of one of the three models of Aux air conditioner, the tables below may be useful for Aux air conditioner troubleshooting. The leftmost column contains information about possible faults and the rightmost column contains information about troubleshooting methods.

Aux ASW-H12B4-E Air Conditioner Troubleshooting

Problems	Causes
The motor is heard operating but the air-conditioner dose not work when the indoor unit is powered on	Since the air-conditioner is powered on, it will come to working condition as long as you press the ON/OFF button of the remote control and the signal is well received.
The compressor stops running but the indoor fan motor keeps working when it is at cooling mode with the indoor temperature higher than set temperature.	If you turn off the air-conditioner and restart it immediately, it will return to normal in3 minutes, after that, the air-conditioner will automatically adjust the indoor fan speed to what you set.
The compressor works discontinuously at dehumidifying mode.	The air-conditioner will automatically control the working of the compressor according to the inside temperature
The air-conditioner dose not work while the LED display is on.	The Timers set with the air-conditioner, it will be in hold on condition. If the TIMER setting is cancelled, the air-conditioner will return to normal working condition.
The compressor works discontinuously at cooling and dehumidifying mode, and the indoor fan motor slows down.	The compressor stops internally or the fan motor slows down to prevent the indoor heat exchanger from being frozen.

Aux EA Series Air Conditioner Troubleshooting

Problem	Possible Causes	What To Do
Zoneline does not start	The unit is unplugged.	• Make sure the Zoneline plug is pushed completely into the outlet.
	The power cord is not firmly attached.	• Remove the room cabinet and make sure that the yellow connector on the end of the power cord is firmly engaged.
	The fuse is blown/circuit breaker is tripped.	• Check the house fuse/circuit breaker box and replace the fuse or reset the breaker.
	The unit is waiting for the compressor overload protector to reset.	• This is normal. The Zoneline will start again after it resets.
	Power failure.	• If power failure occurs, set the mode control to STOP. When power is restored, set the mode control to the desired setting.
		• There is a protective time delay (up to 3 minutes) to prevent tripping of the compressor overload. For this reason, the unit may not start normal heating or cooling for 3 minutes after it is turned back on.
	The current interrupter device is tripped.	• Press the RESET button located on the power cord plug or the box near the plug.
		• If the RESET button will not stay engaged, discontinue use of the Zoneline and contact a qualified service technician.
Zoneline does not cool or heat as it should	Indoor airflow is restricted.	• Make sure there are no curtains, blinds or furniture blocking the front of the Zoneline.
	Outdoor airflow is restricted or recirculated.	• Make sure the rear grille is not restricted. This can cause the unit to cycle off due to the compressor overload protector.
		• Outdoor grille must have a minimum of 65% free area.
	The temp control may not be set properly.	• Turn the control to a lower or higher setting.
		NOTE The temperature limiter may be limiting the temperature range.
	The air filter is dirty.	• Clean the filter at least every 30 days.
	The room may have been hot or cold.	• When the Zoneline is first turned on you need to allow time for the room to cool down or warm up.
	Outdoor air is entering the room.	• Set the vent control to the closed position.
Burning odor at the start of heating operation	Dust is on the surface of the heating element.	• This can cause a "burning" odor at the beginning of the heating operation. This odor should quickly fade.
The air is not always cool or hot during operation	The heat pump is not producing hot air.	• This is normal. The heat pump will produce warm air but not as hot as air produced when the higher-cost electric heat is used.
	The Smart Fan Auxiliary Controls may be set to continuous fan.	• This causes the fan to blow room temperature air even when the compressor or heater cycles off. The continuous air movement provides better overall temperature control in the cool mode.
The air does not feel warm enough during heating operation	The heat pump alone produces air that feels cooler than desired.	• Use the Electric Heat Option. This turns off the heat pump and warms with electric heat only.
		NOTE: Use of this option will result in increased energy consumption.
The unit is not blowing out air	The Smart Fan Auxiliary Controls may be set to cycle.
The electric heating feature does not work	The power cord is not firmly attached.	• Remove the room cabinet and make sure that the yellow connector on the end of the power cord is firmly engaged.
Temperature display flashes	The compressor may have failed.	• Set the operation control to STOP and then restart the unit. If the flashing light reappears within 30 minutes, call for service.

Aux AM-12A4 Air Conditioner Troubleshooting

OCCURRENCE	SOLUTION
Air conditioner will not operate.	Wall plug disconnected. Push plug firmly into wall outlet.
	Plug Current Device Tripped. Press the RESET button.
	House fuse blown or circuit breaker tripped. Replace fuse with time delay type or reset circuit breaker.
	Selector Control in OFF position. Turn selector to ON (some models) or the desired FAN or COOL setting.
	Unit turned off by moving thermostat to a higher number and then immediately turning back to a colder
	number. Wait approximately 3 minutes. Listen for compressor to restart
	Unit turned off and then on too quickly. Turn unit off and wait 3 minutes before restarting.
	Temperature selector set too low. Adjust temperature selector to higher number for cooling.
Air from unit does not feel cold enough.	Turn selector to a higher COOL position.
	Temperature selector set too warm. Set temperature selector to colder temperature.
	Room temperature below 70° F (21 °C). Cooling may not occur until room temperature rises above 70 °F (21 °C).
	Temperature sensing tube touching cold coil, located behind air filter. Straighten tube away from coil.
Air conditioner cooling, but room is too warm - ice forming on cooling coil behind decorative front	Outdoor temperature below 70 °F (21 °C). To defrost the coil, set selector to a FAN position. Then, set thermostat to warmer position.
	Air filter may be dirty. Clean filter. To defrost, set selector to FAN.
	Temperature selector set too cold for night-time cooling. To defrost the coil, set selector to a FAN position. Then, set temperature selector to warmer position.
Air conditioner cooling, but room is too warm - NO ice forming on cooling coil behind ecorative front.	Dirty air filter - air restricted. Clean air filter.
	Temperature selector set too warm. Turn temperature selector clockwise to a colder setting.
	Air directional louvers positioned improperly. Position louvers for better air distribution.
	Front of unit is blocked by drapes, blinds, furniture, etc. - restricts air distribution. Clear blockage in front of unit
	Doors, windows, registers, etc. open - cool air escapes. Close doors, windows, registers, etc.
	Unit recently turned on in hot room. Allow additional time to remove "stored heat" from walls, ceiling, floor and furniture.
Air conditioner turns on and off rapidly.	Dirty air filter - air restricted. Clean air filter.
	Outside temperature extremely hot. Set to High Cool to bring air through cooling coils more frequently.
Noise when unit is cooling.	Air movement sound. This is normal. If too loud, turn selector to lower FAN setting.
	Sound of fan hitting water-moisture removal system. This is normal when humidity is high. Close doors, windows and registers.
Water dripping INSIDE when unit is cooling.	Improper installation. Tilt air conditioner slightly to the outside to allow water drainage.
Water dripping OUTSIDE when unit is cooling.	Unit removing large quantity of moisture from humid room. This is normal during excessively humid days.
Room too cold.	Temperature selector set too high, set to a lower number on temperature dial.

Bryant air conditioner troubleshooting

The tables below will give you a chance to learn about some common problems associated with the air conditioning systems, and the easiest ways of troubleshooting them. Depending on your qualifications, experience, desire, and the type of malfunction you may either call for service or try to fix the appliance on your own, saving money and time.

Bryant 187B I air troubleshooting

OPERATION	FAULT	AMBER LED FLASH CODE	POSSIBLE CAUSE AND ACTION
Standby no call for unit operation	None	On solid, no flash	Normal operation
Low-stage Cool/Heat Operation	None	1, pause
High-stage Cool/Heat Operation	None	2, pause
	System Communications Failure	16	Communication with user interface lost. Check wiring to User Interface, indoor and outdoor units
	Invalid Model Plug	25	Control does not detect a model plug or detects an invalid model plug. Unit will not operate without correct model plug.
	High Pressure Switch Open	31	High-pressure switch trip. Check refrigerant charge, outdoor fan operation and coils for airflow restrictions.
	Low Pressure Switch Open	32	Low pressure switch trip. Check refrigerant charge and indoor air flow
	Control Fault	45	Outdoor unit control board has failed. Control board needs to be replaced.
	Brown Out (230 v)	46	Line voltage < 187v for at least 4 seconds. Compressor and fan operation not allowed until voltage>190v. Verify line voltage.
	No 230v at Unit	47	There is no 230v at the contactor when indoor unit is powered and cooling/ heating demand exists. Verify the disconnect is closed and 230v wiring is connected to the unit.
	Outdoor Air Temp Sensor Fault	53	Outdoor air sensor not reading or out of range. Ohm out sensor and check wiring.
	Outdoor Coil Sensor Fault	55	Coil sensor not reading or out of range. Ohm out sensor and check wiring.
	Thermistors out of range	56	Improper relationship between coil sensor and outdoor air sensor. Ohm out sensors and check wiring.
	Low stage Thermal Cutout	71	Compressor operation detected then disappears while low-stage demand exists. Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long (if installed)
	High stage Thermal Cutout	72
	Contactor Shorted	73	Compressor voltage sensed when no demand for compressor operation exists. Contactor may be stuck closed or there is a wiring error.
	No 230V at Compressor	74	Compressor voltage not sensed when compressor should be starting. Contactor may be stuck open or there is a wiring error.
	Low-stage Thermal Lockout	81	Thermal cutout occurs in three consecutive low/ high-stage cycles, low-stage locked out for 4 hours or until 24v power recycled.
	High-stage Thermal Lockout	82
	Low Pressure Lockout	83	Low pressure switch trip has occurred during 3 consecutive cycles. Unit operation locked out for 4 hours or until 24v power recycled.
	High Pressure Lockout	84

Bryant EVOLUTION 577D-A air troubleshooting

SYMPTOM	CAUSE	REMEDY
	Power failure	Call power company
	Fuse blown or circuit breaker tripped	Replace fuse or reset circuit breaker
	Defective contactor, transformer, control relay, or high- pressure, loss-of-charge or low-pressure switch	Replace component
	Insufficient line voltage	Determine cause and correct
Compressor and outdoor fan will not start	Incorrect or faulty wiring	Check wiring diagram and rewire correctly
	Ul setting too lowfloo high	Reset Ul setting
	Units have a 5-minute time delay	DO NOT bypass this compressor time delay-wait for 5 minutes until time-delay relay is de-energized
Compressor will not start but condenser fan runs	Faulty wiring or circuit Loose connections in compressor	Check wiring and repair or replace
	Compressor motor burned out, seized, or internal overload open	Determine cause Replace compressor
	Defective run capacitor, overload, or PTC (positive temperature coefficient) thermistor	Determine cause and replace
	Low input voltage (20 percent low)	Determine cause and correct
Compressor cycles (other than normally satisfying) cooling/heating calls	Refrigerant overcharge or undercharge	Recover refrigerant, evacuate system, and re- charge to capacities shown on rating plate
	Defective compressor	Replace and determine cause
	Insufficient line voltage	Determine cause and correct
	Blocked outdoor coil
	Defective run/start capacitor, overload or start relay
	Faulty outdoor fan motor or capacitor	Replace
	Restriction in refrigerant system	Locate restriction and remove
Compressor operates continuously	Dirty air filter	Replace filter
	Unit undersized for load	Decrease load or increase unit size
	Ul temperature set too low	Reset Ul setting
	Low refrigerant charge	Locate leak, repair, and recharge
	Air in system	Recover refrigerant, evacuate system, and re- charge
	Outdoor coil dirty or restricted	Clean coil or remove restriction
Excessive head pressure	Dirty air filter	Replace filter
	Dirty indoor or outdoor coil	Clean coil
	Refrigerant overcharged	Recover excess refrigerant
	Air in system	Recover refrigerant, evacuate system, and re- charge
	Indoor or outdoor air restricted or air short-cycling	Determine cause and correct
Head pressure too low	Low refrigerant charge	Check for leaks, repair and recharge
	Restriction in liquid tube	Remove restriction
Excessive suction pressure	High heat load	Check for source and eliminate
	Reversing valve hung up or leaking internally	Replace valve
	Refrigerant overcharged	Recover excess refrigerant
Suction pressure too low	Dirty air filter	Replace filter
	Low refrigerant charge	Check for leaks, repair and recharge
	Metering device or low side restricted	Remove source of restriction
	Insufficient coil airflow	Check filter-replace if necessary
	Temperature too low in conditioned area	Reset Ul setting
	Outdoor ambient below 55°F (13°C)	Verify low-ambient cooling enabled in Ul
	Filter drier restricted	Replace
IFM does not run	Blower wheel not secured to shaft	Properly tighten blower wheel to shaft
	Insufficient voltage at motor	Determine cause and correct
	Power connectors not properly sealed	Connectors should snap easily; do not force
IFM operation is intermittent	Water dripping into motor	Verify proper drip loops in connector wires
	Connectors not firmly sealed	Gently pull wires individually to be sure they are crimped into the housing
Burners will not ignite	Water in gas line	Drain. Install drip leg.
	No power to unit	Check power supply fuses, wiring or circuit breaker.
	No 24-v power supply to control circuit	Check transformer. NOTE: Some transformers have internal over- current protection that requires a cool-down peri- od to reset.
	Mis-wired or loose connections	Check all wiring and wire nut connections
	Misaligned spark electrodes	Check flame ignition and sense electrode positioning. Adjust as necessary.
	No gas at main burners	1. Check gas line for air. Purge as necessary. NOTE: After purging gas line of air, wait at least 5 minutes for any gas to dissipate before attempt- ing to light unit. 2. Check gas valve.
	Inducer pressure switch not closing	1. Check pressure switch wires, connections, and tubing. Repair or replace if necessary.
Inadequate heating	Dirty air filter	Clean or replace filter as necessary
	Gas input to unit too tow	Check gas pressure at manifold match with that on unit nameplate
	Unit undersized for application	Replace with proper unit or add additional unit
	Restricted airflow	Clean or replace filter. Remove any restriction.
	Limit switch cycles main burners	Check rotation of blower, temperature rise of unit. Adjust as necessary.
Poor flame characteristics	Incomplete combustion results in: Aldehyde odors, carbon monoxide, sooting flame, floating flame	1. Tighten all screws around burner compartment 2. Cracked heat exchanger. Replace. 3. Unit over-fired. Reduce input (change orifices or adjust gas line or manifold pressure). 4. Check burner alignment. 5. Inspect heat exchanger for blockage. Clean as necessary.

Carrier air conditioner troubleshooting

Is your Carrier air conditioner making unusual noise, not cooling or not heating? Are there any other strange symptoms? The tips provided in the table below will help you with the most common problems that may occur with an air conditioning system. In many cases troubleshooting home appliances is possible even for do-it-yourselfers without much experience.

Carrier 38BK-009 air troubleshooting

Trouble	Check Points	Action
Unit does not operate	• Check that the power cord is plugged into the wall outlet.	Insert the power cord into the wall outlet
	• Has the circuit breaker tripped or the fuse blown?	Reset the circuit breaker or replace the fuse with the specified replacement fuse.
	• Has there been a power failure?	Flestart operation when power is resumed.
	• If the "UNIT ON" lamp flashes on and off?	Call your service representative.
	• Is the voltage too low?	Confirm the available voltage.
Cooling is abnormally low.	• Is the filter blocked with dust?	Clean the air filter.
	• Has the temperature been set property?	Check and reset it if necessary.
	• Are the windows and doors opened?	Close the windows and doors.
	• Is anything obstructing the outdoor unit?	Flemove the obstruction.
	• Is the fan speed too low?	Change the fan speed selection.
	• Is the operation mode FAN or AUTO?	Change to cooling operation or reset temperature.
Heating is abnormally low.	• Is the fitter blocked with dust?	Clean the air filter.
	• Has the temperature been set too low?	Check and reset it if necessary.
	• Are the windows or doors opened?	Close the windows and doors.
	• Is anything obstructing the outdoor unit?	Remove the obstruction.
Unit stops during ' operation.	• Has the OFF timer operated?	Switch OFF timer function.
	• Has the room temperature reached the set temperature?	Normal operation.
Air cleaning does not operate.	• On the indoor unit display, is the air cleaning lamp turned off and the checking lamp turned on?	Press the RESET button.
		Air cleaning lamp is turned on after a minute. If not, call service representative.

Carrier WEATHERMAKER 4850AJ air troubleshooting

PROBLEM	SOLUTION
COMPRESSOR DOES NOT RUN Active Alarm	Check active alarms using local display.
Contactor ODen
1. Power off.	1. Restore power.
2. Fuses blown in field power circuit.	2. After finding cause and correcting, replace with correct size fuse.
3. No control power.	3. Check secondary fuse(s); replace with correct type and size. Replace transformer if primary windings receiving power.
4. Compressor circuit breaker tripped.	4. Check for excessive compressor current draw. Reset breaker; replace if defective.
5. Safety device lockout circuit active.	5. Reset lockout circuit at circuit breaker.
6. High-pressure switch open.	6. Check for refrigerant overcharge, obstruction of outdoor airflow, air in system or whether compressor discharge valve is fully open. Be sure outdoor fans are operating correctly.
7. Loose electrical connections.	7. Tighten all connections.
Contactor Closed
1. Compressor leads loose.	1. Check connections.
2. Motor windings open.
3. Single phasing.	3. Check for blown fuse. Check for loose connection at compressor terminal.
4. ASTP activated (48/50A2,A3,A4,A5 only)	4. Allow 30 to 120 minutes for cool down.
COMPRESSOR STOPS ON HIGH PRESSURE Outdoor Fan On
1. High-pressure switch faulty.	1. Replace switch.
2. Airflow restricted.	2. Remove obstruction.
3. Air recirculating.	3. Clear airflow area.
4. Noncondensables in system.	4. Purge and recharge as required.
5. Refrigerant overcharge.	5. Purge as required.
6. Line voltage incorrect.	6. Consult power company.
7. Refrigerant system restrictions.	7. Check or replace filter drier, expansion valve, etc. Check that compressor discharge valve is fully open.
8. Fan running in reverse direction.	8. Correct wiring.
Outdoor Fan Off
1. Fan slips on shaft.	1. Tighten fan hub setscrews.
2. Motor not running.	2. Check power and capacitor.
3. Motor overload open.	3. Check overload rating. Check for fan blade obstruction.
4. Motor burned out.	4. Replace motor.
COMPRESSOR CYCLES ON LOW PRESSURE Indoor-Air Fan Runnina
1. Filter drier plugged.	1. Replace filter drier.
2. Expansion valve power head defective.	2. Replace power head.
3. Low refrigerant charge.	3. Add charge.
4. Faulty pressure transducer.	4. Check that pressure transducer is connected and secured to suc- tion line. If still not functioning, replace transducer.
Airflow Restricted
1. Coil iced up.	1. Check refrigerant charge.
2. Coil dirty.	2. Clean coil fins.
3. Air filters dirty.	3. Clean or replace filters.
4. Dampers closed.	4. Check damper operation and position.
Indoor-Air Fan StoDDed
1. Electrical connections loose.	1. Tighten all connections.
2. Fan relay defective.	2. Replace relay.
3. Motor overload open.	3. Power supply.
4. Motor defective.	4. Replace motor.
5. Fan belt broken or slipping.	5. Replace or tighten belt.
COMPRESSOR RUNNING BUT COOLING INSUFFICIENT
Suction Btessur.e.Low
1. Refrigerant charge low.	1. Add refrigerant.
2. Head pressure low.	2. Check refrigerant charge.
3. Air filters dirty.	3. Clean or replace filters.
4. Expansion valve power head defective.	4. Replace power head.
5. Indoor coil partially iced.	5. Check low-pressure setting.
6. Indoor airflow restricted.	6. Remove obstruction.
UNIT OPERATES TOO LONG OR CONTINUOUSLY
1. Low refrigerant charge.	1. Add refrigerant
2. Control contacts fused.	2. Replace control.
3. Air in system.	3. Purge and evacuate system.
4. Partially plugged expansion valve or filter drier.	4. Clean or replace.
SYSTEM IS NOISY
1. Piping vibration.	1. Support piping as required.
2. Compressor noisy.	2. Replace compressor.
COMPRESSOR LOSES OIL
1. Leak in system.	1. Repair leak.
2. Crankcase heaters not energized during shutdown.	2. Check wiring and relays. Check heater and replace if defective.
HOT LIQUID LINE
1. Shortage of refrigerant due to leak.	1. Repair leak and recharge.
2. Expansion valve opens too wide.	2. Adjust expansion valve.
FROSTED LIQUID LINE Restricted filter drier.
INDOOR FAN CONTACTOR OPEN	Remove restriction or replace.
1. Power off.	1. Restore power.
2. Fuses blown in field power circuit.	2. After finding cause and correcting, replace with correct fuses.
3. No control power.	3. Check secondary fuses. Replace with correct type and size. Replace transformer if primary windings are receiving power.
INDOOR FAN CONTACTOR CLOSED
1. VFD overload function tripped.
2. Motor leads loose.	2. Check connections at motor lead junction box.
3. Motor windings open.	3. Check motor windings.
4. Single phasing.	4. Check for blown fuse. Check for loose connections at motor junction box.
5. Belts broken or thrown.	5. Check belts. Replace as complete set if necessary.
6. Circuit breaker tripped.	6. Check for excessive current draw. Reset breaker. Replace if defective.

Carrier Superia Plus K+ Series air troubleshooting

Malfunctions	Cause	What should be done?
Unit does not start	Power cut	Wait for power to be restored.
	Unit may have become Unplugged.	Check that plug is securely in wall receptacle.
	Fuse may have blown.	Replace the fuse.
	Battery in Remote controller may have been exhausted.	Replace the battery.
	The time you have set with timer is incorrect.	Wait or cancel timer setting.
Unit not cooling or heating (Cooling/ heating models only) room very well while air flowing out from the air conditioner	Inappropriate temperature setting.	Set temperature correctly
	Air filter is blocked.	Clean the air filter.
	Doors or Windows are open.	Close the doors or windows.
	Air inlet or outlet of indoor or outdoor unit has been blocked.	Clear obstructions away first, then restart the unit.
	Compressor 3 or 4 minutes protection has been activated.	Wait.

Chigo Air Conditioner Troubleshooting

Chigo air conditioner troubleshooting can take a lot of time and money if you do not have a good manual at hand. 5 tables below contain information about the cause of the problem and different ways to solve it. Therefore, these tables can be useful for the owner of the air conditioner and the repairman.

Chigo HR12LED Air Conditioner Troubleshooting

Trouble	Analysis
Does not run	If the protector trip or fuse is blown.
	Please wait for 3 minutes and start again, protector device may be preventing unit from working.
	If batteries in the remote controller exhausted.
	If the plug is not properly plugged in.
Runs for a short while only	If the set temperature is close to room temperature, you can lower the set temperature.
	Air outlet blocked by obstacle.
	Take the obstacle away.
Runs but not cooling	If the door or window is open.
	If there is another heating appliance working, like heater or lamp, etc. .
	The air filter is dirty, please clean it.
	Air outlet or intake blocked.
	Set temperature is too high.
Water leaks during moving	Drain the condensate before moving.
Does not run and water full indicator lights	Pull out the rubber plug to drain water.
	If it is often in this state, please contact qualified service technicial.

Chigo CSG-07HVR1 Air Conditioner Troubleshooting

Problem	Cause	Remedy
• Unit does not operate, stand-by indicator lights	Remote control malfunctions ©The remote control is locked	Check remote control batteries
		Try to operate from a close distance
		Start from on-unit controls
		Unlock the remote control
• Unit does not respond properly to remote control command	IR signal does not reach unit ©Distance between remote control and unit too large or aimed at from improper angle	Check for obstruction between unit and remote control, clear if needed.
	IR receiver on-unit exposed to strong light source	Get closer to unit Dim lights, fluorescents especially
• Air does not blow out from indoor unit	© -icing protection mode is activated © Unit AUTO FAN mode ©Over cooling in DRY	Normal operation in HEATING mode operation in DRY mode
• COOLING , DRY or HEATING does not start immediately	3-min,Compressor delayed start	Normal operation for these modes
• Unit functions but does not perform sufficiently	Improper temperature setting ©Unit capacity in sufficient for load or room size	Reset temperature
		Consult your dealer

Chigo V64T9AD Air Conditioner Troubleshooting

Trouble display	Faulty contents
The timing lamp lightens all the time, the sleeping lamp lightens 2 times , and then extinguish 2 seconds«	Communication fault
The timing lamp lightens all the time, the sleeping lamp lightens 5 times , and then extinguish 2 seconds«	Indoor fan fault
The timing lamp lightens all the time, the sleeping lamp lightens 3 times , and then extinguish 2 seconds«	Indoor temp, sensor fault
The timing lamp lightens all the time, the sleeping lamp lightens 4 times , and then extinguish 2 seconds«	Indoor coil outlet temp, sensor fault
	Indoor coil inlet temp, sensor fault
	Indoor coil middle temp, sensor fault
The timing lamp lightens 1 time , and then extinguish 1 second«	Mode conflict
The running lamp lightens 1 time , and then extinguish 1 second«	Defrosting or anti cold air

Chigo CCB 12HR1 Air Conditioner Troubleshooting

Faults	LED
High pressure failure	Green light flashes once every 5s
Low pressure failure	Green light flashes 2 times every 5s
Temperature sensorT3 failure	Green light flashes 3 times every 5s
Overflow test failure	Green light flashes 4 times every 5s
Phase sequence test failure	Green light flashes 5 times every 5s
Exhaust temperature over-high failure	Green light flashes 6 times every 5s
Normal communication receiving	Yellow light keeps constant on
No communication receiving	Yellow light extinguishes
Communication failure warning	Yellow light flashes

Chigo KYD-25XC Air Conditioner Troubleshooting

Trouble	Check	Action
Air conditioner does not operate at all	Is power fail?	It is normal.
	Is plug out?	Push the plug into the wall socket, change the fuse or switch on.
	Is power fuse or switch off?	Pour the water out of the water tank.
	If drain tank indicator is lit?	Push the water tank into rigth place.
	If the water tank is placed correctly? If SET TIME suitable?	Change SET TIME
Cooling efficiency is not good	Is air inlet or outlet locking?	Clear the locking
	Is there any other heat source in room? Are air filters dirty very much?	Move the heat source
	Is SET TEMP, suitable?	Clean the air filter
	Is indoor fan speed set at low?	Set temperature suitable
		Set suitable fan speed.
Too noise and vibration	It is the inner liquid (refrigerantgeration) flowing inside.	It is normal
	Is it inclines?	Place it in a horizontal floor
The machine start and stop frequently	Is the voltage of the power source normal? Is the air exhaust fixed rightly or be bended?	Keep the power source in rated
	Are you add air exhaust yourself?	Try to keep the air exhaust horizonal not permit enlarge Don't add air exhaust yourself and remove it

Duo Therm Air Conditioner Troubleshooting

Is your DuoTherm air conditioner on, but it is not working or is the airflow rate is insufficient? For DuoTherm air conditioner troubleshooting, you don’t have to call the repairman. Sometimes it is enough to understand the cause of failure and the way of its removal. The table below could help.

Problem	Solution
If the air conditioner/heat pump doesn’t run (the fan and/or the compressor)	If the air conditioner/heat pump doesn’t run (the fan and/or the compressor), check the AC voltage. If the thermostat has no lights showing, it means it is not receiving DC power. The 12-volt DC fuse should be checked. You may also want to look at the breaker at the electrical source. To check your AC voltage when you arrive at your destination, plug in your electrical cord. Inside your vehicle place a voltmeter into a receptacle and start your air conditioner or heat pump. When the compressor starts after a two-minute delay, check your voltage. It must be over 103.5 volts for the air conditioner to operate
When the fan runs and the compressor tries to start but won’t run	When the fan runs and the compressor tries to start but won’t run, examine the exterior heavy-duty long extension cord, receptacle and plug. If those are in working order, check the AC voltage
If the fan runs, but the compressor cycles on and off and doesn’t cool correctly	If the fan runs, but the compressor cycles on and off and doesn’t cool correctly, it could be improper or poor air flow, a dirty filter, dirty condenser, short cycling (a duct leak) or the AC voltage may be the problem.
If the compressor doesn’t cycle at all	If the compressor doesn’t cycle at all, a qualified technician should check the filter (which must be clean) and the condenser. It is important to check the condenser to determine if it is blocked. The condenser is visible with the Brisk Air units, but the Penguin air conditioner shroud will need to be removed for inspection. If the condenser is blocked, the debris will need to be removed by a technician
Poor or improper air flow	Poor or improper air flow, short cycling, a dirty filter or placing the thermostat on its minimum temperature setting and the fan on low speed in high humidity situations can cause evaporator freeze-up
It’s leaking! What should you do?	First, this is something that should be repaired by a certified technician. The technician will take a good look at the mounting bolts, roof gasket and condensation drain holes. It is also good to be sure the technician checks for roof damage

Frigidaire Air Conditioner Troubleshooting

Has your Frigidaire air conditioner suddenly broken down? Do not rush to call the service center. Save your time and money. Use the manual (select the instruction below for your model). In the left column there is a description of the damage and in the right column there is a method of correction of the fault. Such manual should always be close at hand.

Frigidaire 66121330 Air Conditioner Troubleshooting

Problem	Cause	Solution
Air conditioner will not operate	■ The power supply cord is unplugged.	Plug into grounded 3 prong outlet.
	■ The power supply cord has tripped (Reset button has popped out).	Press and release RESET (listen for click; Reset button will latch and on some devices, a green light will turn on) to resume operation.
	■ A household fuse has blown, or circuit breaker has tripped.	Replace the fuse or reset the circuit breaker.
	■ Depending on model, the Power button has not been pressed or the Fan Speed control is turned to Off.	Press POWER or turn the Fan Speed control to an active setting.
	■ The local power has failed.	Wait for power to be restored.
Air conditioner blows fuses or trips circuit breakers	■ Too many appliances are being used on the same circuit.	Unplug or relocate appliances that share the same circuit.
	■ Time-delay fuse or circuit breaker of the wrong capacity is being used.	Replace with a time-delay fuse or circuit breaker of the correct capacity.
	■ An extension cord is being used.	Do not use an extension cord with this or any other appliance.
	■ You are trying to restart the air conditioner too soon after turning the unit off.	Wait at least 3 minutes after turning the unit off before trying to restart the air conditioner
Air conditioner power supply cord trips (Reset button pops out)	■ Disturbances in your electrical current can trip (Reset button will pop out) the power supply cord.	Press and release RESET (listen for click; Reset button will latch and on some devices, a green light will turn on) to resume operation.
	■ An electrical overloading, overheating, pinching or aging can trip (Reset button will pop out) the power supply cord.	After correcting the problem, press and release RESET (listen for click; Reset button will latch and on some devices, a green light will turn on) to resume operation.
Air conditioner seems to run too much	■ The current air conditioner replaced an older model.	The use of more efficient components may cause the air conditioner to run longer than an older model, but the total energy consumption will be less. Newer air conditioners do not emit the “blast” of cold air you may be accustomed to from older units, but this is not an indication of lesser cooling capacity or efficiency.
	■ The air conditioner is in a heavily occupied room, or heatproducing appliances are in use in the room.	Use exhaust vent fans while cooking or bathing and try not to use heatproducing appliances during the hottest part of the day. A higher capacity air conditioner may be required, depending on the size of the room being cooled.
Air conditioner cycles on and off too much or does not cool	■ The Mode is set to Power Saver (on some models).	Use Power Saver only when you are asleep or away from home, since the fan does not circulate the room air continuously. Use Low, High or Turbo for your best comfort.
	■ The air conditioner is not properly sized for your room.	Check the cooling capabilities of your room air conditioner. Room air conditioners are not designed to cool multiple rooms.
	■ The filter is dirty or obstructed by debris.	Clean the filter.
	■ The inside evaporator and outside condenser coils are dirty or obstructed by debris.
	■ There is excessive heat or moisture (open container cooking, showers, etc.) in the room.	Use a fan to exhaust heat or moisture from the room. Try not to use heatproducing appliances during the hottest part of the day.
	■ The louvers are blocked. Install the air conditioner in a location where the louvers are free from curtains, blinds, furniture, etc.
	■ The outside temperature is below 65°F (18°C).	Do not try to operate your air conditioner in the cooling mode when the outside temperature is below 65°F (18°C).
	■ The temperature of the room you are trying to cool is extremely hot.	Allow extra time for the air conditioner to cool off a very hot room.
	■ Windows or doors to the outside are open.	Close all windows and doors.
	■ The Exhaust control is set to OPEN (on some models).	Push the Exhaust control CLOSED for maximum cooling
	. ■ Depending on model, the Temp/Time or Temperature control is not at a cool enough setting.	Adjust the Temp/ Time control to a cooler setting by pressing the minus button to reduce the temperature or adjust the Temperature control to a cooler setting by turning the knob clockwise. Set the Fan Speed control to highest setting (Turbo or High, depending on model).

Frigidaire FAX050S7A Air Conditioner Troubleshooting

SYMPTON	POSSIBLE CAUSE
Fan motor will not run.	No power.
	Power supply cord.
	Selector switch.
	Energy saving switch (if applicable).
	Electronic control (if applicable).
	Wire disconnected or connection loose.
	Capacitor. (Discharge capacitor before testing.)
	Defective fan motor windings.
	Will not rotate. Fan blade hitting shroud or blower wheel hitting scroll. (Motorcycles on overload.)
Fan motor runs intermittently.	Cycle on motor protector.
Compressor will not run, but fan motor runs.	Voltage.
	Wiring.
	Selector switch.
	Temperature control.
	Capacitor. (Discharge capacitor before testing.)
	Compressor.
	Motor protector (external).
	Motor protector (internal).
	Electronic control (if applicable).
	Hard starting.
Compressor cycles on motor protector.	Voltage.
	Motor protector (external).
	Motor protector (internal).
	Fan motor.
	Condenser airflow restriction.
	Condenser fins damanged.
	Capacitor.
	Wiring.
	Refrigerant system.
Insufficient cooling.	Low capacity.
	Airfilter.
	Exhaust door open.
	Unit undersized.
Excessive noise.	Evaporator blower wheel.
	Condenser wheel.
	Copper tubing.
	Compressor internal noise.
	Fan motor.
Excessive water or condensation.	Unit operating under extremely high humidity
	conditions.
No cooling.	Refrigerant leak.
Unit is cooling but room is not cool.	Amps and watts.
	Sealed refrigeration system.
Wattage decreases slowly until abnormally low.	Undercharged, restricted strainer or plugged restrictor tube.
Wattage decreases immediately.	No refrigerant.
	Compressor defective.
Wattage continuously high.	Refrigerant overcharge.

Frigidaire FRA052XT7 Air Conditioner Troubleshooting

OCCURRENCE	SOLUTION
Air conditioner will not operate.	Wall plug disconnected. Push plug firmly into wall outlet.
	Plug Current Device Tripped. Press the RESET button.
	House fuse blown or circuit breaker tripped. Replace fuse with time delay type or reset circuit breaker.
	Selector Control in OFF position. Turn selector to ON (some models) or the desired FAN or COOL setting.
	Unit turned off by moving thermostat to a higher number and then immediately turning back to a colder
	number. Wait approximately 3 minutes. Listen for compressor to restart
	Unit turned off and then on too quickly. Turn unit off and wait 3 minutes before restarting.
	Temperature selector set too low. Adjust temperature selector to higher number for cooling.
Air from unit does not feel cold enough.	Turn selector to a higher COOL position.
	Temperature selector set too warm. Set temperature selector to colder temperature.
	Room temperature below 70° F (21 °C). Cooling may not occur until room temperature rises above 70 °F (21 °C).
	Temperature sensing tube touching cold coil, located behind air filter. Straighten tube away from coil.
Air conditioner cooling, but room is too warm - ice forming on cooling coil behind decorative front	Outdoor temperature below 70 °F (21 °C). To defrost the coil, set selector to a FAN position. Then, set thermostat to warmer position.
	Air filter may be dirty. Clean filter. To defrost, set selector to FAN.
	Temperature selector set too cold for night-time cooling. To defrost the coil, set selector to a FAN position. Then, set temperature selector to warmer position.
Air conditioner cooling, but room is too warm - NO ice forming on cooling coil behind ecorative front.	Dirty air filter - air restricted. Clean air filter.
	Temperature selector set too warm. Turn temperature selector clockwise to a colder setting.
	Air directional louvers positioned improperly. Position louvers for better air distribution.
	Front of unit is blocked by drapes, blinds, furniture, etc. - restricts air distribution. Clear blockage in front of unit
	Doors, windows, registers, etc. open - cool air escapes. Close doors, windows, registers, etc.
	Unit recently turned on in hot room. Allow additional time to remove "stored heat" from walls, ceiling, floor and furniture.
Air conditioner turns on and off rapidly.	Dirty air filter - air restricted. Clean air filter.
	Outside temperature extremely hot. Set to High Cool to bring air through cooling coils more frequently.
Noise when unit is cooling.	Air movement sound. This is normal. If too loud, turn selector to lower FAN setting.
	Sound of fan hitting water-moisture removal system. This is normal when humidity is high. Close doors, windows and registers.
	Window vibration - poor installation.
Water dripping INSIDE when unit is cooling.	Improper installation. Tilt air conditioner slightly to the outside to allow water drainage.
Water dripping OUTSIDE when unit is cooling.	Unit removing large quantity of moisture from humid room. This is normal during excessively humid days.
Room too cold.	Temperature selector set too high, set to a lower number on temperature dial.

Fujitsu air conditioner troubleshooting

Although Fujitsu air conditioners are considered high quality products, it is not rare for them to suffer from malfunctions. In many cases, they are caused by minor issues and can be fixed in less than half an hour. If you are ready to try troubleshooting your home appliance on your own, check out the symptom your air conditioner is having in the table below.

	Symptom	Problem
NORMAL FUNCTION	Doesn't operate immediately:	• If the unit is stopped and then immediately started again, the compressor will not operate for about 3 minutes, in order to prevent fuse blowouts.
		• Whenever the electrical breaker is turned off than on again or the power supply plug is disconnected and then reconnected, the protection circuit will operate for about 3 minutes, preventing unit operation during that period.
	Noise is heard:	• During operation and immediately after stopping the unit, the sound of water flowing in the air conditioner's piping may be heard. Also, noise may be particularly noticeable for about 2 to 3 minutes after starting operation (sound of coolant flowing).
		• During operation, a slight squeaking sound may be heard. This is the result of minute expansion and contraction of the front cover due to temperature changes.
		• During Heating operation, a sizzling sound may be heard occasional. This sound is produced by the Automatic Defrosting operation.
	Smells:	• Some smell may be emitted from the indoor unit. This smell is the result of room smells (furniture, tobacco, etc.) which have been taken into the air conditioner.
	Mist or steam are emitted:	• During Cooling or Dry operation, a thin mist may be seen emitted from the indoor unit. This results from the sudden Cooling of room air by the air emitted from the air conditioner, resulting in condensation and misting.
		• During Heating operation, the outdoor unit's fan may stop, and steam may be seen rising from the unit. This is due to Automatic Defrosting operation.
	Airflow is weak or stops:	• When Heating operation is started, fan speed is temporarily very low, to allow internal parts to warm up.
		• During Heating operation, if the room temperature rises above the thermostat setting, the outdoor unit will stop, and the indoor unit will operate at very low fan speed. If you wish to warm the room further, set the thermostat for a higher setting.
		• During Heating operation, the unit will temporarily stop operation (between 7 and 15 minutes) as the Automatic Defrosting mode operates. During Automatic Defrosting operation, the OPERATION Indicator Lamp will flash.
		• The fan may operate at very low speed during Dry operation or when the unit is monitoring the room's temperature.
		• During SUPER QUIET operation, the fan will operate at very low speed.
		• In the monitor AUTO operation, the fan will operate at very low speed.
	Water is produced from the outdoor unit:	• During Heating operation, water may be produced from the outdoor unit due to Automatic Defrosting operation.
	The damper opens and closes automatically	• The damper is automatically controlled by a microcomputer according to the air flow temperature and operation time of the air conditioner.
CHECK ONCE MORE	Doesn't operate at all:	• Has there been a power failure?
		• Has a fuse blown out, or a circuit breaker been tripped?
		• Is the timer operating?
	Poor performance:	• Is the Air Filter dirty?
		• Air the air conditioner's intake grille or outlet port blocked?
		• Did you adjust the room temperature settings (thermostat) correctly?
		• Is there a window or door open?
		• In the case of Cooling operation, is a window allowing bright sunlight to enter? (Close the curtains.)
		• In the case of Cooling operation, are there heating apparatus and computers inside the room, or are there too many people in the room?
		• Make sure the lower air outlet is not choked with foreign matters, causing abnormal operation to damper.
		• Is the unit set for SUPER QUIET operation?
	The unit operates differently from the Remote Control Unit's setting:	• Are the Remote Control Unit's batteries dead?
		• Are the Remote Control Unit's batteries loaded properly?

Gibson air conditioners troubleshooting

Gibson Heating and Cooling Products became the result of a merger of two companies Belding-Hall (which produced ice-boxes in Belding, Michigan) and Gibson Refrigerator (founded by brothers Frank and John Gibson). The company introduced its first air conditioner in 1953. In 1959, they invented the “air sweep” method to improve the distribution of cool air from the air conditioner. Despite the high quality of Gibson products, air conditioners Gibson break down too. In this case, troubleshooting table below should help.

OCCURRENCE	SOLUTION
Air conditioner will not operate.	Wall plug disconnected. Push plug firmly into wall outlet.
	House fuse blown or circuit breaker tripped.-Replace fuse with time delay type or reset circuit breaker.
	Selector Control in OFF position.-Turn selector to ON-(some models) or the desired FAN-or COOL-setting.
	Unit turned off by moving thermostat to a higher number and then immediately turning back to a colder number. Wait approximately 3 minutes. Listen for compressor to start.
	Unit turned off and then on too quickly. Turn unit off and wait 3 minutes before restarting.
	Thermostat set too low. Adjust thermostat to higher number for cooling.
Air from unit does not feel cold enough.	Turn selector to a higher FAN or COOL position
	Thermostat set too warm. Set thermostat to colder temperature.
	Room temperature below 70°F <21°C). Cooling may not occur until room temperature rises above 70°F (21°C).
	Temperature sensing tube touching cold coil, located behind air filter. Straighten tube away from coil.
Air conditioner cooling, but room is too warm — ice forming on cooling con Denina decorative tront.	Outdoor temperature below 70°F (21°C). To defrost the coil, set selector to FAN position. Then, set thermostat to warmer position.
	Air filter may be dirty. Clean filter. To defrost, set selector to FAN.
	Thermostat set too cold for night-time cooling. To defrost the coil, set selector to a FAN position.
Air conditioner cooling, but room is too warm — NO-ice forming on cooling coil behind decorative front.	Dirty air filter — air restricted. Clean air filter.
	Thermostat set too warm. Turn thermostat clockwise to a colder setting.
	Thermostat set on low number. Turn thermostat to higher number.
	Vent set at OPEN position. Set vent at CLOSED-position for maximum cooling.
	Air directional louvres positioned improperly. Position louvres for better air distribution.
	Front of unit is blocked by drapes, blinds, furniture, etc. — restricts air distribution. Clear blockage in front of unit.
	Doors, windows, registers, etc. open — cold air escapes. Close doors, windows, registers, etc.
	Unit recently turned on in hot room. Allow additional time to remove "stored heat" from walls, ceiling, floor and furniture.
Air conditioner turns on and off rapidly.	Dirty air filter — air restricted. Clean air filter.
	Outside temperature extremely hot. Set FAN on high speed to bring air past cooling coils more frequently.
Noise when unit is cooling.	Air movement sound. This is normal. If too loud, turn selector to lower FAN-setting.
	Sound of fan hitting water-moisture removal system. This is normal when humidity is high. Close doors, windows and registers.
	Window vibration — poor installation.
Water dripping INSIDE-when unit is cooling.	Improper installation. Tilt air conditioner slightly to the outside to allow water drainage.
Water dripping OUTSIDE-when unit is cooling.	Unit removing large quantity of moisture from humid room. This is normal during excessively humid days.

Haier air conditioner troubleshooting

When you discover refrigerant leaks, water drips into your house, air conditioner is not cooling or there’re any other problems with the appliance, don’t call for service immediately. Try following advice from the tables below. This information was provided by the manufacturer, the Chinese consumer electronics company Haier, as a source of quick troubleshooting tips for users.

Haier HW-24CE03 air troubleshooting

Condition	Check Item	Corrective Action
Doesn't operate	Is plug firmly inserted? Is fuse burned out? Is there power failure?	Restore power or replace fuse.
	Is thermostat switch incorrectly adjusted?	Adjust the thermostat.
	Is there direct sunlight into the room?	Use curtain or blinds.
No cool air or poor cooling	Is mode selection switch set to fan mode? Are doors or windows left open?	Shut doors and windows.
	Is there any obstacle blocking air inlet or outlet?	Remove the obstacle.
	Is the fresh air knob shifted to the right? Is there a strong heat source in the room?	Close vent by shifting knob to the left. Remove or turn off the heat source.
	Is air filter clogged?	Remove and clean.

Haier HWR05XCM air troubleshooting

POSSIBLE PROBLEM	POSSIBLE CAUSE	REMEDY
Air Conditioner does not start or operate	Power supply cord is not plugged into an outlet.	Plug unit into a mating grounded outlet.
	Power supply cord has tripped.	Press and release RESET button on the power supply cord.
	Unit is turned off.	Turn on unit using remote control or on control panel.
	A household fuse or circuit breaker has blown.	Replace the fuse or reset the circuit breaker.
Remote control is not working	Batteries are dead.	Replace the batteries.
	Batteries inserted wrong.	Make sure batteries are inserted in the correct position.
Room does not feel cold enough	The room is too hot.	Allow time for the room to cool down when you turn on the unit.
	The temperature control may not be set correctly.	Adjust the temperature control on the control panel or remote control.
	Air flow is restricted.	Make sure the air discharge area is not blocked.
Room feels too cold	Temperature set too low.	Raise the set temperature.
Air conditioner cycles on and off too often	Air filter is dirty or restricted.	Clean the air filter.
	Air flow is restricted.	Make sure the air discharge area is not blocked.
	Outside air temperature is below 61°F.	Do not operate the unit when the outside temperature is below 61°F.
	Outside temperature is very hot.	Raise the FAN speed to the highest setting.
Water drips into your house	Air conditioner is not properly leveled.	Tilt unit slightly from the front to the back. DO NOT drill a hole in the cabinet base.
Water drips outside your house	Hot, humid weather.	This is normal during days with high humidity.
Water collects in cabinet base	Humidity drains into cabinet base.	This is normal during days with high humidity. DO NOT drill a hole in the cabinet base.
Air conditioner is freezing up; ice forming on coil	Temperature outside is too low, below 61°F.	To defrost coil, set to FAN ONLY mode and set temperature higher.

HAIER Room Air Conditioners air troubleshooting

Problem	Solutions
If air conditioner does not operate:	• Check if unit is plugged in. The plug may have come loose. • Check if the unit is in "Off" mode.
Air from air conditioner is warm:	• The A/C setting may need to be raised.
Ice formation on cooling coils:	• Outside temperature too cold Set the unit on fan only setting to defrost ice. • Lower temperature setting. Temperature setting may be too cold. • Unit BTU may be too high for the room.
Air conditioner working but room not cooling:	• Room may have appliances that produce heat. Use an exhaust fan to remove excess heat. • Redirect the airflow. Remove any obstacles. • All doors and windows need to be closed so cool air does not escape the room. • Air filter may need cleaning. • Unit BTU may be too low for the required cooling area. • On extreme hot & humid days air conditioners may take a little longer to cool. • Vent may be in the open position. Vent has to be closed tor optimum cooling.
Air conditioner is making noise when cooling:	You may hear sounds of air movement, water, compressor clicking on and off or window vibrations. Read Operating Guide - Normal Operating Sounds.
Water in the air conditioner cabinet:	This is normal as your air conditioner not only cools but also dehumidifies the air. If there is water dripping inside the room, check the installation of the unit. The unit may need to be reinstalled.

Haier SAP-KRV9AV air troubleshooting

Problem	Solution
Does not operate immediately when the air conditioner is restarted.	When the air conditioner is restarted immediately after being turned off, the overload protection switch will delay starting for three minutes.
An unusual odor is emitted from the outlet after operation is started.	Clean the air filters. If the problem persists, the unit requires servicing. Please contact your authorized SANYO maintenance center.
Sounds of water flowing can be heard during operation.	Occasionally there is a swooshing or gurgling sound when the air conditioner is started, stopped or when the compressor has started or stopped running. These sounds are due to refrigerant flowing and are not malfunctions.
Mist is emitted.	When the indoor temperature and humidity are high, sometimes this phenomeno n occurs. It is caused by the room air being swiftly cooled down. After running for a while, the indoor temperature and humidity will decrease, and the mist will disappear.
A creaking noise can be heard when starting or stopping the unit.	This is caused by the deformation of plastic due to the change of temperature.
The unit will not operate	• Has the power been turned off?
	• Is the power plug loose?
	• Is the voltage too high or too low? (Please ask a qualified service representative to check the voltage.)
	• Has the TIMER ON function been correctly operated?
Cooling (Heating) efficiency is inadequate.	• Is the temperature setting appropriate?
	• Is the filter dirty?
	• Are the windows and doors closed?
	• Is the fen speed set to low?
	• Are there any heat sources in the room?
Remote control unit does not work.	• If the un it is experiencing abnormal interference or the functions are being changed too frequently, wireless remote co ntrol unit may not work properly. Pulling out and firmly re-inserting the power plug should reestablish normal operation.
	• Is the remote control unit pointed at th e receiver?
	Is there any obstruction?
	• Check if the batteries in the control unit are correct; if not, insert the correct batteries.
There is water leakage from the indoor unit.	• The air humidity is on the high side.
	• Condensed water has overflowed.
	• The indoor unit drainage pipe connection is loose.
There is water leakage from the outdoor unit.	• When the unit is operating in COOL mode, condensation will form at the connection of pipe and pipe joint due to the water being cooled down.
Noise is emitting from the indoor unit.	• This is a fan or compressor relay switching (On/ OFF) sound.
	• When the unit is defrosting or has stopped running, sound will be emitted due to the refrigerant flowing in the opposite direction.
The indoor unit does not produce airflow.	• In dehumidifying 4V mode, the indoor fen sometimes stops in order to avoid recondensation.
Moisture forms on the air outlet vent.	• If the unit is operating in high humidity for long periods of time, moisture will condense on the air outlet grill and drip off.

Haier Thermocool HSU-12HQA03 air troubleshooting

	Phenomenon	Cause or check points ""N
Normal Performance inspection	The system does not restart immediately.	• When unit is stopped, it won't restart immediately until 3 minutes have elapsed to protect the system.
		• When the electric plug is pulled out and reinserted, the protection circuit will work for 3 minutes to protect the air conditioner.
	Noise is heard	• During unit operation or at stop, a swishing or gurgling noise may be heard.At first 2-3 minutes after unit start, this noise is more noticeable. (This noise is generated by refrigerant flowing in the system.)
		• During unit operation, a cracking noise may be heard. This noise is generated by the casing expanding or shrinking because of temperature changes.
		• Should there be a big noise from air flow in unit operation, air filter may be too dirty.
	Smells are generated.	• This is because the system circulates smells from the interior air such as the smell of furniture, paint, cigarettes.
	Mist or steam are blown out.	• During COOL or DRY operation, indoor unit may blow out mist. This is due to the sudden cooling of indoor air.
	In dry mode, fan speed can’t be changed.	• In DRY mode, when room temperature becomes lower than temp. setting+2 °C, unit will run intermittently at LOW speed regardless of FAN setting.
Multiple Check		• Is power plug inserted?
		• Is there a power failure?
		• Is fuse blown out?
	Poor cooling	• Is the air filter dirty? Normally it should be cleaned every 15 days.
		• Are there any obstacles before inlet and outlet?
		• Is temperature set correctly?
		• Are there some doors or windows left open?
		• Is there any direct sunlight through the window during the cooling operation?(Use curtain)
		• Are there too much heat sources or too many people in the room , during cooling operation? y

Haier V1124C2H air troubleshooting

Symptom	Possible Cause	Remedy
No cooling	Power off or loose electrical connection	Make sure main sw itch is ON. Check and tighten all connections.
	Incorrect thermostat setting	Set thermostat correctly
	Defective contactor	Check for 24V at contactor coil.
	Open circuit breaker of blown fuses	Reset or replace
	Defective transformer	Check wiring Replace it.
	Interconnecting low voltage wiring damage	Replace thermostat wiring
Insufficient Cooling	Dirty filters	Clean & replace
	Indoor air blockage	Check supply registers and return grills for blockage.
	Blocked outdoor coil	Clear away leaves and other debris
	Improperly sized unit	Recalculate load
	Improper airflow	Check should be 400CFM/Ton
	Incorrect refrigerant charge	Charge correctly
	Air, non-condensable or moisture in system	Recover refrigerant, evacuate & recharge, add filter drier
	Incorrect voltage	At compressor terminals, voltage must be within 10% of rating plate volts w hen unit is running.
Water on floor or in furnace	Blocked condensate drain and "P" trap	Remove blockage
Condenser fan runs, compressor doesn’t	Run or start capacitor defective	Replace
	Loose connection	Check and tighten all connections.
	Compressor stuck, grounded or open	Wait for 2 hours for overload to reset.
	motor winding, open internal overload	Replace compressor if still open.
	Low voltage condition	At compressor terminals, voltage must be within 10% of rating plate volts when unit is running.
	Low voltage condition	Add start kit components
Compressor short-cycling	Incorrect voltage	At compressor terminals, voltage must be within 10% of rating plate volts when unit is running.
	Defective overload protector	Replace check for correct voltage
	Refrigerant undercharge	Add refrigerant
Register sweat	Low evaporator airflow	Increase blower speed or reduce restriction replace air filter
High head Low vapor pressures	Restriction in liquid line, metering device or filter drier	Replace defective components
	Flowrator piston size too small	Change to correct size piston
	Incorrect capillary tubes	Change coil assembly
	Blocked outdoor coil	Clear away leaves and other debris
High head High or normal vapor pressures	Refrigerant overcharge	Correct system charge
	Condenser fan not running	Repair or replace
	Air, non-condensable or moisture in system	Recover refrigerant, evacuate & recharge. add filter drier
Low head High vapor pressures	Flowrator piston size too large	Change to correct size piston
	Defective compressor valves	Replace compressor
Low vapor cool compressor iced evaporator coil	Incorrect capillary tubes	Replace coil assembly
	Low evaporator airflow	Increase blower speed or reduce restriction replace air filter
	Operating below 65 F outdoors	Add low ambient kit
	Moisture in the system	Recover refrigerant, evacuate & recharge, add filter drier
High vapor pressure	Excessive load	Recheck load calculation
	Defective compressor	Replace
Fluctuating head and vapor pressures	Air or non-condensibles in system	Recover refrigerant, evacuate & recharge.
Pulsing noise at metering device or liquid line	Air or non-condensibles in system	Recover refrigerant, evacuate & recharge

Haier AC142ACNAC air conditioner troubleshooting

TROUBLE	CHECKUP RESULT	POSSIBLE REASONS	CORRESPONDING SOLUTION
No response after power being connected	Unavailable voltage at input part of circuit board	The power supply coil isn’t plugged well	Plug the supply coil properly
	Unavailable voltage at one end of the fuse	Damaged wave filtering component	Return to the controller manufacturer for repair
		Damaged fuse	Replace with a good one
	Unavailable output from the consequent pole of transformer	The transformer isn’t plugged well or is damaged	Plug the transformer well or replace with a good one
	Improper output of 7805	Damaged component on power supply unit of indoor board	Return to the controller manufacturer for repair
	Normal power supply for major chip	Damaged major chip
Display board does not make normal response	Indicator lamps do not light	Damaged connection cable between display board and indoor board	Replace with a good connection cable
		Connection cable between display board and indoor board isn’t connected well	Connect the cable well
	Remote control cannot be received	Damaged reception adaptor	Replace with a good one
		Damaged remote circuit or major chip	Return to the controller manufacturer for repair
The buzzer does not beep while making remote control	Unavailable square wave signal at two ends of the buzzer	Damaged dynatron Q1	Replace with a good one
		Damaged major chip	Return to the controller manufacturer for repair
	Available square signal at two ends of the buzzer	Damaged buzzer	Replace with a good one
Indoor blowing fan does not run	No output from 2803 on indoor board	Damaged 2803	Replace with a good 2803
	Normal output of relays K1, JK2, JK3	CN8 on indoor board is not plugged well with connection cable	Connect connection parts well
Indoor blowing fan cannot not generate low wind	No output at 16 pin of 2803 on indoor board	Damaged 2803	Replace with a good 2803
	Unavailable voltage on COM port of relay JK2 on indoor board	Damaged relay JK2	Replace with a good one
	No output at relay JK1 on indoor board	Damaged relay JK1
Indoor blowing fan cannot generate medium wind	No output at 15 pin of 2803	Damaged 2803	Replace with a good 2803
	No voltage at COM of relay JK3 on indoor board	Damaged relay JK3	Replace with a good JK3e
	No output at relay JK2 on indoor hoard	Damaged relay JK2	Replace with a good JK2
Indoor blowing fan cannot generate high wind	No output at 14 pin of 2803	Damaged 2803	Replace with a good 2803
	No output at relay JK3 on indoor board	Damaged relay JK3	Replace with a good JK3
No output of swing	No output at 11 pin of 2803	Damaged 2803	Replace with a good 2803
	No output at relay JK6 of indoor board	Damaged relay JK6	Replace with a good JK6
Unavailable power breakdown memory		No setting has been made	Press sleep button 10 times within 5 seconds (and the buzzer will beep 4 times), the system is then set to power breakdown memory mode.
		Damaged chip IC6 of indoor board	Return to the controller manufacturer for repair
No output of four-way valve during heating program	No output at 18 pin of 2803	Damaged 2803	Replace with a good 2803
	No output of relay JK7 on indoor board	Damaged relay JK7	Replace with a good JK7
	Available output of relay JK7 on indoor board	Socket CN6 is not plugged well with connection cable	Plug CN6 and the connection cable well
No swing wind under swing mode	No output at 12 pin of 2803	Damaged 2803	Replace with a good 2803
	No output of relay JK5 on indoor board	Damaged relay JK5 on indoor board	Replace with a good JK5
	Available output of relay JK5 on indoor board	Socket CN4 is not plugged well with connection cable	Plug CN4 well with the connection cable
During cooling program, the compressor does not start when the temperature meets proper conditions		Three minutes’ protection for compressor	The compressor will work normal after three minutes
		Too low temperature of indoor coil pipe causes overcooling protection	It will restore automatically when the temperature of indoor coil pipe rises to 7°C
	No output at 11 pin of 2803 on indoor board	Damaged 2803	Replace with a good 2803
	No output of relay JK6 on indoor board	Damaged relay JK6 on indoor board	Replace with a good JK6
		Connection cable between the compressor and JK6 isn’t plugged well	Plug the connection cable well
During heating program, the compressor does not start when the temperature meet proper conditions		3 minutes’ delay protection for compressor	It will restore normally after 3
		Too high temperature of indoor coil pipe causes overheat protection	It1 will automatically restore when the temperature of indoor coil pipe falls to 57°C
	No output at 11 pin of 2803 of indoor board	Damaged 2803	Replace with a good 2803
During heating program, the compressor does not start when the temperature meet proper	No output of relay JK6 on indoor board	Damaged relay JK6 on indoor board	Replace with a good JK6
	Available output of relay JK6 on indoor board	Connection cable between compressor and JK6 isn’t plugged well	Plug the connection cable well
During cooling program, the compressor works while outdoor blowing fan does not	No output at collector of Q2 on indoor board	Damaged Q2	Replace with a good Q2
	No output of relay JK8 on indoor board	Damaged relay JK8 on indoor board	Replace with a good JK8
	Available output of relays on indoor board	Socket CN6 is not plugged well with connection cable	Plug the connection cable well
During heating program, the compressor work while outdoor blowing fan does not		Too high temperature of indoor coil pipe causes overheat protection	It will automatically restore when the temperature of indoor coil pipe falls to 57°C
During heating program, the compressor work while outdoor blowing fan does not	No output at collector of Q2 on indoor board	Damaged Q2	Replace with a good Q2
	No output of relay JK8 on indoor board	Damaged relay JK8 on indoor board	Replace with a good JK8
	Available output of relays on indoor board	Socket CN6 is not plugged well with connection cable	Plug the connection cable well
Abnormal overcurrent detection	Current transformer outputs normally	Damaged rectification diode D6-D7 etc.	Return to the controller manufacturer for repair
	T ransformer CT1 outputs abnormally	Damaged transformer CT1	Replace with a good one
	Inaccurate protection current	Adjust the adjustable potentiometer
		Damaged major chip	Return to the controller manufacturer for repair
With timing indicator and compressor indicator extinguishing, the operation indicator flashes every second		Damaged indoor temperature sensor	Replace with a good one
With timing indicator and compressor indicator lighting, the operation indicator flashes every second		Damaged temperature sensor for indoor coil pipe
Water pump indicator flashes every second (trouble for water discharging)	No output at 13 pin of 2803 on indoor board	Damaged 2803	Replace with a good 2803
	No output of relay JK6 on indoor board	Damaged relay JK4 on indoor board	Replace with a good JK4
	Available output of relay JK6 on indoor board	Socket CN5 is not plugged well with connection cable	Plug the connection cable well
		Faulty connection cable to transmit float feedback signal	Replace with a good one

Haier basic air conditioner troubleshooting

PROBLEM	CAUSE/SOLUTIONS
Air Conditioner Will Not Operate	■ The power supply cord is unplugged. Plug into a grounded 3 prong outlet. ■ The power supply cord has tripped (Reset button has popped out). Press and release RESET (listen for click; Reset button will latch and on some devices, a green light will turn on) to resume operation. ■ A household fuse has blown, or circuit breaker has tripped. Replace the fuse or reset the circuit breaker. If the problem continues, call an electrician. ■ The Power button has not been pressed or the Mode control knob is turned to Off. Press POWER or turn the Mode control knob to an active setting. ■ The local power has failed. Wait for power to be restored.
Air conditioner blows fuses or trips circuit breakers	■ Too many appliances are being used on the same circuit. Unplug or relocate appliances that share the same circuit. ■ Timc-delay fuse or circuit breaker of the wrong capacity is being used. Replace with a time-delay fuse or circuit breaker of the correct capacity. ■ An extension cord is being used. Do not use an extension cord with this or any other appliance. ■ You are trying to restart the air conditioner too soon after turning off the air conditioner. Wait at least 3 minutes after turning off the air conditioner before trying to restart the air conditioner.
Air conditioner power supply cord trips (Reset button pops out)	■ Disturbances in your electrical current can trip (Reset button will pop out) the power supply cord. Press and release RESET (listen for dick; Reset button will latch and on some devices, a green light will turn on) to resume operation. ■ Electrical overloading, overheating, cord pinching or aging can trip (Reset button will pop out) the power supply cord. After correcting the problem, press and release RESET (listen for click; Reset button will latch and on some devices, a green light will turn on) to resume operation. NOTE: A damaged power supply cord must be replaced with a new power supply cord obtained from the product manufacturer and must not be repaired.
Air conditioner seems to run too much	■ The current air conditioner replaced an older model. The use of more efficient components may cause the air conditioner to run longer than an older model, but the total energy consumption will be less. Newer air conditioners do not emit the ‘blast" of cold air you may be accustomed to from older air conditioners, but this is not an indication of lesser cooling capacity or efficiency. ■ The air conditioner is in a heavily occupied room, or heatproducing appliances are in use in the room. Use exhaust vent fans while cooking or bathing and try not to use heatproducing appliances during the hottest part of the day. A higher capacity air conditioner may be required, depending on the size of the room being cooled.
Air conditioner cycles on and off too much or does not cool room in cooling mode	■ The air conditioner is not properly sized for your room. Check the cooling capabilities of your room air conditioner. Room air conditioners are not designed to cool multiple rooms. ■ The filter is dirty or obstructed by debris. Clean the filter. ■ There is excessive heat or moisture (open container cooking, showers, etc.) in the room. Use a fan to exhaust heat or moisture from the room. Try not to use heatproducing appliances during the hottest part of the day. ■ The louvers are blocked. Install the air conditioner in a location where the louvers are free from curtains, blinds, furniture, etc. ■ The outside temperature is below 61 °F (16°C). Do not try to operate your air conditioner in the cooling mode when the out- side temperature is below 61°F (16°C). ■ The temperature of the room you are trying to cool is extremely hot. Allow extra time for the air conditioner to cool off a very hot room. ■ Windows or doors to the outside are open. Close all windows and doors. ■ The Temperature control is not at a cool enough setting. Adjust the TEMP/TIME control to a cooler setting by pressing the minus button to reduce the temperature. Set the Fan Speed control to the highest setting.
Water drips from cabinet into your house	■ The air conditioner is not properly leveled. The air conditioner should slope slightly downward toward the outside. Level the air conditioner to provide a downward slope toward the outside to ensure proper drainage.

HAIER HPR09XC7 air conditioner troubleshooting

Trouble	Analysis
Does not run	•If the protector trip or fuse is blown.
	•Please wait for 3 minutes and start again, protector device may be preventing unit to work.
	•If batteries in the remote controller exhausted. •If the plug is not property plugged.
Run a short while only	•If the set temperature is close to room temperature, you can low the set temperature.
	•Air outlet be blocked by obstacle. Take the obstacle away.
Run but not cool	•If the door or window open.
	•If there is other heater appliance work, like heater or lamp, etc...
	•The air filter is dirty, please clean it. •Air outlet or intake be blocked.
	•Set temperature is too high.
Do not run and water full indicator lights	• Drain the water into a prepared container by the drainage pipe on the rear panel of the unit.
	If stil doesn’t work, please consult a qualified technician.

Heil air conditioners troubleshooting

The company Heil Heating and Cooling Products has a rich 100-year history of superior engineering and quality manufacturing. Each unit of the company’s products is tested. All products are designed to provide the maximum quality, efficiency and reliability in operation. However, despite this, Heil equipment can also break down. Therefore, refer to the troubleshooting table below.

Status LED	Status LED Description	Status LED Troubleshooting Information
Green “POWER”	Module has power	Supply voltage is present at module terminals
Red “TRIP”	Thermostat demand signal Y is present, but the compressor is not running	1. Compressor protector is open
		• Check for high head pressure
		• Check compressor supply voltage
		2. Outdoor unit power disconnect is open
		3. Compressor circuit breaker or fuse(s) is open
		4. Broken wire or connector is not making contact
		5. Compressor contactor has failed open
Yellow “ALERT”. Flash Code 1	Long Run Time. Compressor is running extremely long run cycles (18 hours or more)	1. Low refrigerant charge
		2. Evaporator blower is not running
		• Check blower relay coil and contacts
		• Check blower motor for failure or blockage
		• Check evaporator blower wiring and connectors
		• Check indoor blower control board
		• Check thermostat wiring for open circuit
		3. Evaporator coil is frozen
		• Check for low suction pressure
		• Check for excessively low thermostat setting
		• Check evaporator airflow (coil blockages or return air filter)
		• Check ductwork or registers for blockage
		4. Faulty metering device
		• Check TXV bulb installation (size, location, and contact)
		• Check if TXV is stuck closed or defective
		5. Condenser coil is dirty
		6. Liquid line restriction (filter drier blocked)
		7. Compressor high-stage cooling wiring
		• Solenoid plug not connected / malfunction
		• Comfort Alert ^ failure
		8. Thermostat is malfunctioning
		• Check thermostat sub-base or wiring for short circuit
		• Check thermostat installation (location, level)
Yellow “ALERT” . Flash Code 2	Internal Protector Trip	1. The internal motor protector has opened
		• Wait for compressor to cool down, protector will close automatically
Yellow “ALERT”. Flash Code 3	Short Cycling. Compressor is running only briefly (1 -3 minutes)	1. Thermostat demand signal is intermittent
		2. High head pressure
		• Check high pressure switch
		• Check if system is overcharged with refrigerant
		• Check for non-condensable in system
		3. Condenser coil poor air circulation (dirty, blocked, damaged)
		4. Condenser fan is not running
		• Check fan capacitor
		• Check fan wiring and connectors
		• Check fan motor for failure or blockage
		5. Return air duct has substantial leakage
		6. Low pressure switch open, see Flash Code 1 information
Yellow “ALERT” . Flash Code 4	Locked Rotor	1. Run capacitor has failed
		2. Low line voltage (contact utility if voltage at disconnect is low, below 187v)
		• Check wiring connections
		3. Excessive liquid refrigerant in compressor
		4. Compressor bearings are seized
Yellow “ALERT”. Flash Code 5	Open High Voltage Circuit	1. Outdoor unit power disconnect is open
		2. Compressor circuit breaker or fuse(s) is open
		3. Compressor contactor has failed open
		• Check compressor contactor wiring and connections
		• Check for compressor contactor failure (burned, pitted, open)
		• Check wiring and connectors between supply and compressor
		• Check for low pilot voltage at compressor contactor coil
		4. Open circuit in compressor supply wiring or connections
		5. Unusually long compressor protector reset time due to extreme ambient temperature
		6. Compressor windings are damaged
		• Check compressor motor winding resistance
Yellow “ALERT”. Flash Code 6	Open Start Circuit. Current only in run circuit	1. Run capacitor has failed
		2. Open circuit in compressor start wiring or connections
		• Check wiring and connectors between supply and the compressor “S” terminal
		3. Compressor start winding is damaged
		• Check compressor motor winding resistance
Yellow “ALERT”. Flash Code 7	Open Run Circuit. Current only in start circuit	1. Open circuit in compressor run wiring or connections
		• Check wiring and connectors between supply and the compressor “R" terminal
		2. Compressor run winding is damaged
		• Check compressor motor winding resistance
Yellow “ALERT”. Flash Code 8	Welded Contactor. Compressor always runs continuous operation	1. Compressor contactor has failed closed
		2. Thermostat demand signal not connected to module
Yellow “ALERT”. Flash Code 9	Low Voltage. Control circuit < 17 VAC	1. Control circuit transformer is overloaded
		2. Low line voltage (contact utility if voltage at disconnect is low) • Check wiring connections

Kelvinator Air Conditioner Troubleshooting

Air conditioning of a good brand can save you time and money on its repair. But breakdowns are inevitable no matter what brand your air conditioner is. Therefore, it is necessary to have a full manual at hand. In the issue of Kelvinator air conditioner troubleshooting, you will need the tables below.

Kelvinator KSV26CRC Air Conditioner Troubleshooting

Problem	Cause
The unit does not operate	The unit does not operate if it is turned on immediately after it is turned off. This is to protect the unit. You should wait about 3 minutes.
Odours are emitted	• Some odours may be emitted from the indoor unit. This is the result of room smells (such as furniture, tobacco, etc.) which have been taken into the air conditioner.
	• Consult authorised service centre for cleaning if the odours persist.
"Water flowing" noise	The swishing noise like water flowing is the refrigerant flowing inside the unit.
Mist is emitted in COOL mode	During cooling operation, a thin mist may be seen emitted from the indoor unit due to high room temperature and humidity.
	After a period of time, the mist will disappear as the decrease of room temperature and humidity decreases.
Cracking noise	This is the sound of friction caused by expansion and/or contraction of panel or other parts due to the change of temperature.
The unit can not be started up	• Is the power cut off?
	• Is the power plug loose? (if applicable)
	• Is the circuit protection device tripped off?
	• Is voltage higher or lower? (Tested by professionals)
	• Is the TIMER correctly used?
Cooling/Heating effect is poor	• Is temperature setting appropriate?
	• Is the inlet or outlet blocked?
	• Is the filter dirty?
	• Is the window or the door open?
	• Is low fan speed set?
	• Are there heat sources in the room?
Remote control does not transmit signals	• Check if there is magnetic or electrical interference near the unit that may affecting operation of the remote control. In this case, pull the plug out and reinsert it.
	• Is the remote control within its operating range or obstructed? Check the condition of the batteries and replace them if necessary.
	• Check if the remote control is damaged.
Water leakage of outdoor unit	• During cooling operation, water condensates around the pipes and connection joints.
	• During defrosting operation, thawed water flows out.
	• During heating operation, water on the heat exchanger drips out.
Noise from indoor unit.	• The noise emitted when the fan or compressor relay is switched on or off.
	• When the defrosting operation is started or stopped, there is a sound of refrigerant flowing in the reverse direction.
Indoor unit can not blow air	• In HEAT mode, when the temperature of indoor heat exchanger is very low, air flow is stopped in order to prevent cold air. (within 2 minutes)
	• In HEAT mode, when the outdoor temperature is low or humidity is high, frost will be formed on the outdoor heat exchanger. The unit will defrost automatically and indoor unitwill stop blowing air for 3-12 minutes.
	• During defrosting operation, water or vapour may be emitted.
	• In DRY mode, the indoor fan will stop blowing air for 3-12 minutes in order to avoid condensing water being vaporised again.
Moisture on air outlet	• If the unit operates at high humidity for a long time, moisture will be generated on the air outlet grill and then drip off.
H1: Defrosting	It is normal. The unit is in defrosting mode and heating will recommence soon.
E3: Low pressure warning	Your air conditioner has lost refrigerant. Contact your installer to check for potential leaks.

Kelvinator KWH20HRB Air Conditioner Troubleshooting

Problem	Possible Causes	What To Do M
Air conditioner does not start	■ The air conditioner is unplugged.	• Make sure the air conditioner plug is pushed completely into the outlet and switched on.
	■ The fuse is blown/circuit breaker is tripped.	• Check the house fuse/circuit breaker box and replace the fuse or reset the breaker.
	■ Power failure.	• If power failure occurs, switch off and disconnect /unplug the power cord. When power is restored, reconnect (plug in) the power cord, switch on the power and wait 3 minutes to restart the air conditioner to prevent tripping of the compressor overload.
Air conditioner does not cool as it should	■ Airflow is restricted.	• Make sure there are no curtains, blinds, or furniture blocking the front of the air conditioner.
	■ The air filter is dirty.	• Clean the filter at least every 2 weeks.
	■ The room may have been hot.	• When the air conditioner is first turned on you need to allow time for the room to cool down.
	■ Cold air is escaping.	• Check for open furnace floor registers and cold air returns.
	■ Cooling coils have iced up.	• Set the air conditioner's vent to the closed position.
Air conditioner freezing up	■ Ice blocks the air flow and stops the air conditioner from cooling the room.	• Set the fan at MED or HIGH until the ice melts.

Kelvinator KSV26CRE Air Conditioner Troubleshooting

Problem	Possible Causes	Discriminating Method (Air conditioner Status)	Troubleshooting
Air Conditioner Can't be Started Up	No power supply, or poor connection for power plug	After energization, operation indicator isn’t bright and the buzzer can't give out sound	Confirm whether it's due to power failure. If yes, wait for power recovery. If not, check power supply circuit and make sure the power plug is connected well.
	Wrong wire connection between indoor unit and outdoor unit, or poor connection for wiring terminals	Under normal power supply circumstances, operation indicator isn't bright after energization	Check the circuit according to circuit diagram and connect wires correctly. Make sure all wiring terminals are connected firmly
	Electric leakage for air conditioner	After energization, room circuit breaker trips off at once	Make sure the air conditioner is grounded reliably
			Make sure wires of air conditioner is connected correctly
			Check the wiring inside air conditioner. Check whether the insulation layer of power cord is damaged; if yes, place the power cord.
	Model selection for air switch is improper	After energization, air switch trips off	Select proper air switch
	Malfunction of remote controller	After energization, operation indicator is bright, while no display on remote controller or buttons nave no action.	Replace batteries for remote controller Repair or replace remote controller
Poor Cooling (Heating) for Air Conditioner	Set temperature is improper	Observe the set temperature on remote controller	Adjust the set temperature
	Rotation speed of the IDU fan notor is set too low	Small wind blow	Set the fan speed at high or medium
	Filter of indoor unit is blocked	Check the filter to see it's blocked	Clean the filter
	Installation position for indoor unit and outdoor unit is improper	Check whether the installation position is proper according to installation requirement for air conditioner	Adjust the installation position, and install the rainproof and sun proof for outdoor unit
	Refrigerant is leaking	Discharged air temperature during cooling is higher than normal discharged wind temperature; Discharged air temperature during heating is lower than normal discharged wind temperature; Unit's pressure is much lower than regulated r ange	Find out the leakage causes and deal with it. Add refrigerant.
	Malfunction of 4-way valve	Blow cold wind during heating	Replace the 4-way valve
	Malfunction of capillary	Discharged air temperature during cooling is higher than normal discharged wind temperature; Discharged air temperature during heating is ower than normal discharged wind temperature; Unit't pressure is much lower than regulated r ange. If refrigerant isn’t leaking, part of capillary s blocked	Replace the capillary
	Flow volume of valve is insufficient	The pressure of valves is much lower than that stated in the specification	Open the valve completely
	Malfunction of horizontal louver	Horizontal louver can’t swing
	Malfunction of the IDU fan motor	The IDU fan motor can't operate
	Malfunction of the ODU fan motor	The ODU fan motor can't operate
	Malfunction of compressor	Compressor can’t operate
ODU fan Motor Can't Operate	Wrong wire connection, or poor connection	Check the wiring status according to circuit diagram	Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly
	Capacity of the ODU fan motor is damaged	Measure the capacity of fan capacitor with an universal meter and find that the capacity is out of the deviation range indicated on the nameplate of fan capacitor.	Replace the capacity of fan
	Power voltage is a little low or nigh	Use universal meter to measure the power supply voltage. The voltage is a little high or low	Suggest to equip with voltage regulator
	Motor of outdoor unit is damaged	When unit is on, cooling/heating performance s bad and ODU compressor generates a lot of noise and heat.	Change compressor oil and refrigerant. If no better, replace the compressor with a new one
Compressor Can't Operate	Wrong wire connection, or poor connection	Check the wiring status according to circuit diagram	Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly
	Capacity of compressor is damaged	Measure the capacity of fan capacitor with an universal meter and find that the capacity is out ol the deviation range indicated on the nameplate of fan capacitor.	Replace the compressor capacitor
	Power voltage is a little low or nigh	Use universal meter to measure the power supply voltage. The voltage is a little high or low	Suggest to equip with voltage regulator
	Coil of compressor is burnt out	Use universal meter to measure the resistance between compressor terminals and it's 0	Repair or replace compressor
	Cylinder of compressor is blocked	Compressor can't operate
Air Conditioner is Leaking	Drain pipe is blocked	Water leaking from indoor unit	Eliminate the foreign objects inside the drain pipe
	Drain pipe is broken	Water leaking from drain pipe	Replace drain pipe
	Wrapping is not tight	Water leaking from the pipe connection place of indoor unit	Wrap it again and bundle it tightly
Abnormal Sound and Vibration	When turn on or turn off the unit, the panel and other parts will expand and there's abnormal sound	There's the sound of -PAPA"	Normal phenomenon. Abnormal sound will disappear after a few minutes.
	When turn on or turn off the unit, there's abnormal sound due to flow of refrigerant inside air conditioner	Water-running sound can be heard
	Foreign objects inside the indoor unit or there're parts touching together inside the indoor unit	There's abnormal sound from indoor unit	Remove foreign objects. Adjust all parts' position of indoor unit, tighten screws and stick damping plaster between connected parts
	Foreign objects inside the outdoor unit or there're parts touching together inside the outdoor unit	There's abnormal sound from outdoor unit	Remove foreign objects. Adjust all parts' position of outdoor unit, tighten screws and stick damping plaster between connected parts

Kelvinator CRE287PM Air Conditioner Troubleshooting

Problem	Cause
The unit does not operate	The unit does not operate if it is turned on immediately after it is turned off. This is to protect the unit compressor. Please wait for about 3 minutes before turning the unit on again.
Odours are emitted	Some odours may be emitted from the indoor unit. This is the result of room smells (such as furniture, tobacco, etc) which have been taken into the unit.
	Consult your authorised service centre for cleaning if the odours persist.
"Water flowing" noise	The swishing noise like water flowing is the refrigerant flowing inside the unit.
Mist is emitted in COOL mode	During cooling operation, a thin mist may be seen emitted from the indoor unit due to high room temperature and humidity. After a period of time, the mist will disappear as the room temperature and humidity decrease.
Cracking noise	This is the sound of friction caused by expansion and/or contraction of panel or other parts due to the change of temperature.
The unit cannot be started up	• Is the power cut off?
	• Is the power plug loose?
	• Is the circuit protection device tripped off?
	• Is voltage higher or lower? (tested by professionals)
	• Is the TIMER correctly used?
	• Are the batteries exhausted?
Cooling/Heating effect is poor	• Is the temperature setting appropriate?
	• Is the air inlet/outlet blocked?
	• Is the filter dirty?
	• Is the door or window open?
	• Is low fan speed set?
	• Are there heat sources in the room?
Water leakage of indoor unit	• The humidity is high.
	• Condensing water overflows.
	• Drain hose is loose or obstructed.
Water leakage of outdoor unit	• During cooling operation, water condenses around the pipes and connection joints.
	• During defrosting operation, thawed water flows out.
	• During heating operation, water on the heat exchanger drips out.
Noise from indoor unit	• The noise emitted when the fan or compressor relay is switched on or off.
	• When the defrosting operation is started or stopped, there is a sound of refrigerant flowing in the reverse direction.
Indoor unit cannot blow air	• In HEAT mode, when the temperature of indoor heat exchanger is very low, airflow is stopped in order to prevent cold air (within 2 minutes).
	• In HEAT mode, when the outdoor temperature is low or humidity is high, frost will be formed on the outdoor and the indoor heat exchanger. The unit will defrost automatically and indoor unit will stop blowing air for 2-3 minutes.
	• During defrosting operation, water or vapour may be emitted.
	• In DEHUMIDIFY mode, the indoor fan will stop blowing air for 3 to 12 minutes in order to avoid condensing water being vapourised again.
Moisture on the air outlet	If the unit operates at high humidity for a long time, moisture may be generated on the air outlet grill and then drip off.
H1 code: defrosting	This is normal. The unit is in defrosting operation and heating will recommence soon.

Kelvinator KSV70HRE Air Conditioner Troubleshooting

Problem	Cause	Solution
Air Conditioning will not operate	• Power switch is released.	■Switch on the power.
	• Power supply failure.	■Wait for power to be restored.
	•The fuse is burnt.	■Replace the fuse.
	•It doesn't reach the set time for start up.	■Wait or eliminate the original setting.
Unit Doesn't Start When Pressing On/off Button	•Water full indicator flashing, drain tank is full.	■Dump the water in the drain tank.
	•Room temperature is lower than the set temperature.	■Reset the temperature.
Not cooling	•Mistakes in temperature setting.	■Set a proper temperature, sec the methods of application.
	•The air filter is blocked by dust.	■Clean the air filter.
	•The air inlet or outlet of machinc is blocked.	■Remove the obstruction.
	•Unit recently turned on in hot room.	■Allow additional time to remove stored heat from walls ,ceiling, floor and furniture.
	•The doors or windows are open.	■Close the doors and windows.
Noise or vibration	•The ground is not level.	■Place the unit on a flat surface.

Kelvinator KSV25CRG Air Conditioner Troubleshooting

Symptom	Cause
Operation is delayed after restart	To prevent blowout of the fuse, the compressor will not operate while the protection circuit is working for about 3 minutes after sudden OFF/ON operation of the power supply, this is normal operation and designed to protect the compressor.
Fan speed changes from off, to very slow and then normal	Automatically happens in heating mode :
	• prevents cold air blowing onto occupants when the heating operation is start,
	• perform automatic defrosting operation,
	• perform low temperature heating operation
Heating operation stops suddenly and defrost-light blinks	In HEAT mode, the indoor unit temporarily stops for maximum of 10 minutes to perform the automatic defrosting operation.
Mist coming out of the indoor unit	In COOL mode, a mist generated by condensation formed with sudden cooling process may be emitted.
	Mist may generate due to moisture generated from defrosting process when the air conditioner restarts in HEAT mode operation after defrosting
Low volume sounds are emitted by the air conditioner	Hissing sound - during operation or immediately after stopping the air conditioner, refrigerant flowing sound may be head.
	Squeaking sound- normal expansion and contraction of plastic and metal parts caused by temperature change during the operation.
	Rushing air- when louver resets its position.
Dust discharges from the unit	May occur when air conditioner is used for the first time or has not been used for a long time.
Emits a peculiar odour	Various smells generated from interior textile, furniture, or cigarette smoke absorbed into the air conditioner may be emitted. If not the case call an authorised service contractor.
Changes to fan only while cooling or heating mode	Room temperature reaches the temperature setting of the remote control. If not the case call your suitable contractor.
Operation is erratic, unpredictable or unresponsive	Interference from cell phone towers and remote boosters may cause the unit to malfunction
	Disconnect the power and then re-connect.
	Press the ON/OFF button on the remote controller to restart operation.

Kenmore Air Conditioner Troubleshooting

You can choose the brand and model of the air conditioner for a long time, but not one is insured against damage. If you have air conditioning brand Kenmore, it will last a long time. And to save your money and time in the case of Kenmore air conditioner troubleshooting, use the tables below as manuals.

Kenmore 580.75050 Air Conditioner Troubleshooting

Problem	Cause	Solution
THE AIR CONDITIONER WILL NOT OPERATE	Wall plug disconnected.	Push plug firmly into wall outlet.
	House fuse blown or circuit breaker tripped.	Replace fuse with time delay type or reset circuit breaker.
	MODE selector is OFF position.	Turn MODE selector to the desired COOL setting.
	Unit was turned off and then on too quickly.	Turn unit off and wait 3 minutes before restarting.
	TEMP Control set warmer than room temperature.	Turn TEMP Control clockwise to a cooler setting (higher number).
	The current interrupter device is tripped	Press the RESET button located on the power cord plug If the RESET button will not stay engaged, discontinue use of the air conditioner and contact a qualified service technician.
AIR FROM UNIT DOES NOT FEEL COLD ENOUGH	Fan Speed Switch in LOW position.	Turn Fan Speed Switch to HI position
	Control Knob set too warm.	Turn Mode/Temp Control Knob clockwise to a cooler setting.
	Room temperature below 70 F (21 °C).	Cooling may not occur until room temperature rises above 70 F (21 C).
	Temperature sensing tube touching evaporator coil, located behind front grille.	Remove front grille, and straighten tube away from evaporator coil.
THE AIR CONDITIONER COOLING, BUT ROOM IS TOO WARM - ICE FORMING ON COOLING COIL BEHIND INLET GRILLE	Outdoor temperature below 70°F (21°C).	To defrost the coil, set Mode/Temp Control Knob to Fan Only position.
	Air filter may be dirty.	Clean filter.To defrost, set Mode/Temp control to Fan Only position.
	Mode/Temp control Knob set too cold for night-time cooling.
THE AIR CONDITIONER COOLING, BUT ROOM IS TOO WARM	Dirty air filter - air restricted.	Clean air filter.
	Mode/Temp control Knob set too warm.	Control Knob clockwise to a COOLER setting.
	Front of unit is blocked by drapes, blinds, furniture, etc. Air distribution is restricted.	Clear blockage in front of unit.
	Doors, windows, registers, etc. open. Cold air escapes.	Close doors, windows, registers, etc.
	Unit recently turned on in hot room.	Allow additional time to remove stored heat from walls, ceiling, floor, and furniture.
THE AIR CONDITIONER TURNS ON AND OFF RAPIDLY	Outside temperature is extremely hot.	Set Fan Speed Switch on HIGH speed to bring air past cooling coils faster.
NOISE WHEN UNIT IS COOLING	Sound of fan hitting water - from the moisture removal system.	This is normal when humidity is high. Close doors, windows, and registers.
	Window vibration - poor installation.
WATER DRIPPING INSIDE ROOM WHEN UNIT IS COOLING	The air conditioner is improperly installed.	Tilt air conditioner slightly to the outside to allow water drainage.
WATER DRIPPING OUTSIDE WHEN UNIT IS COOLING	The unit is removing large quantities of moisture from humid room.	This is normal during excessively humid days.

Kenmore Elite Air Conditioner Troubleshooting

Problem	Cause	Solution
THE AIR CONDITIONER RUNS TOO MUCH	Energy Saver is chosen.	Inside blower continues operating for one minute to use as much cooling that is available in the evaporator.
	Current Unit replaced an older unit.	Newer, higher efficiency Air Conditioner may run longer to cool the room. Total energy consumption is less due to higher efficiency.
	BTU size is too small.	A higher capacity unit may be required depending on the size of the room being cooled.
WATER DRIPPING FROM AIR CONDITIONER - INSIDE ROOM	Unit is not properly installed.	Unit should be mounted on a 1 /4" downward slope to the outside (1 /2 bubble on a carpenter's level) to provide proper drainage. Reposition or shim cabinet as necessary. DO NOT drill drain pan.
WATER DRIPPING FROM AIR CONDITIONER - OUTSIDE ROOM	Room is hot and humid.	Normal operation during hot and humid days.
THE REMOTE WILL NOT OPERATE AIR CONDITIONER	Batteries are not installed properly.	Verify batteries are installed properly.
	The remote is pointed at the unit.	The remote may not work properly when used at extreme angles to the front of the unit.
TYPICAL AIR CONDITIONER SOUNDS YOU MAY HEAR	High pitched whine or pulsating noise that cycles on and off.	Compressor - Normal noise due to modern high efficiency compressors.
	Rushing air sound.	Fan/Motor - Normal noise of higher efficiency fans pushing air further into the room.
	Pinging or swishing sounds.	Condenser - Normal noise of water hitting the condenser to increase energy efficiency.
	Gurgling or hissing sounds.	Evaporator - Normal noise of refrigerant passing through evaporation.
	Beeping.	Electronic Control - Normal noise when electronic control settings are changed.
	Vibration.	Unit Vibration - Due to poor wall or window construction or incorrect installation.

Kenmore 253.77082 Air Conditioner Troubleshooting

Problem	Cause	Solution
THE AIR CONDITIONER WILL NOT OPERATE	Power supply cord is disconnected	Firmly push the cord into a live wall outlet having proper voltage.
	House fuse has blown or circuit breaker tripped	Replace the fuse with a time delay type or reset the circuit breaker.
	Power is OFF.	Push ON/OFF Button to turn ON.
	Temperature setting is warmer than room temperature.	Set temperature to a lower setting.
	Unit was turned OFF and ON too quickly.	Built-in delay will prevent compressor from turning on for 3 minutes.
	Timer shut unit OFF.	Push ON/OFF Button to turn unit ON.
	Touch Pad and Remote not responding.	Unit is in a locked mode. Unplug unit for 10 seconds, and then plug in again and the controls will reset.
	Power Cord has tripped	Press the RESET button on the plug head.
THE AIR CONDITIONER BLOWS FUSES OR TRIPS CIRCUIT BREAKER	House fuse has blown or circuit breaker tripped.	Replace the fuse with a time delay type or reset the circuit breaker.
	Too many electrical devices are being used on the same circuit.	Unplug or relocate electrical devices being shared on same circuit.
	Unit is rated over 7.5 amps.	Unit should be plugged into a single circuit outlet.
	Unit is plugged into an extension cord.	Do not use an extension cord to run the unit.
	Unit was turned OFF and ON too quickly.	Turn unit OFF and wait 3 minutes before restarting.
THE AIR CONDITIONER TURNS ON AND OFF BY ITSELF	Outside temperature is extremely hot.	Set fan speed at the fastest setting for maximum cooling.
	ENERGY SAVER feature is on.	ENERGY SAVER feature does not circulate air continually. Set mode to COOL for constant air circulation.
	Timer turned unit ON or shut unit OFF.	Push ON/OFF Button to turn unit ON or OFF.
THE AIR CONDITIONER DOES NOT COOL THE ROOM - ICE BEHIND FRONT PANEL	Outside temperature is below 16 °C.	Set mode to FAN ONLY and fan speed to fastest setting to defrost coil.
	Filter is dirty.	Open front panel. Remove filter. Rinse or vacuum filter. Replace filter. Close Panel
	BTU size is too large.	A lower capacity unit may be required depending on the size of the room being cooled.
THE AIR CONDITIONER DOES NOT COOL THE ROOM - NO ICE BEHIND FRONT PANEL	Filter is dirty.	Open front panel. Remove filter. Rinse or vacuum filter. Replace filter. Close Panel
	Temperature setting is warmer than room temperature.	Set temperature to a lower setting.
	Room temperature is below 16 °C	Unit is not designed to cool below 16 °C.
	Front of unit is blocked by furniture, drapes, blinds, etc.	Clear away area in front of unit.
	Back of unit is blocked by leaves, dirt, branches, etc.	Clear away back of unit.
	Doors, windows, registers, etc. are open.	Close doors, windows, registers, etc.
	Unit recently turned on.	Allow time to cool a larger room.
	Temperature sensor is touching the coil.	Open front panel. Remove filter. Turn end of temperature sensor away from coil. Replace filter. Close panel.
	Excessive heat in the room being cooled.	Use exhaust vents while cooking or bathing. Limit use of heat producing appliances during the hottest part of the day.
	Vent control (on some models) is pulled open.	Push in vent control for maximum cooling.

Kenmore 35132 Air Conditioner Troubleshooting

PROBLEM	POSSIBLE COUSE	SOLUTION
Can 1 turn the unit on immediately after unpacking it?		• No. The unit must be placed upright for at least 1 2 hours after every transport. Otherwise the compressor may be damaged and there is no capacity.
Unit does not start when pressing power button	• Room temperature is higher than the set temperature (heating mode).	• Reset the temperature
	• Room temperature is lower than the set temperature (cooling mode)
The air conditioner does not come on	• No electricity	• Restore electricity
	• It is not plugged into the socket	• Plug into socket
	• The internal safety device has tripped	• Wait 30 minutes, if the problem persists, contact your service center
	• The safety device of the plug has tripped	• Reset the safety plug
The air conditioner works for a short time only	• There are bends or kinks in the air exhaust hose	• Position the air hose correctly, keeping it as short and free of curves as possible to avoid bottlenecks
	• Something is preventing the air from being discharged	• Check and remove any obstacles obstructing air discharge
Room is not cool enough	• Windows/doors in room are open.	• Close all windows/doors
	• There are heat sources nearby.	• Remove heat source if possible
	• Exhaust air duct is not connected or is blocked	• Connect the air duct and make sure it can function properly
	• Temperature setting is too high.	• Decrease the set temperature
	• Air filter blocked by dust.	• Clean the air filter
The air conditioner does not operate for about three minutes after restarting it	• The internal compressor safety device prevents the appliance from being restarted until three minutes have elapsed since it was last turned off	• Wait. This delay is part of normal operation
Noise or vibrations	• The floor level is not in level or the unit is on an incline.	• Place the unit on a flat, level surface.
Gurgling sound	• The sound come from the flowing of refrigerant inside the air conditioner	• This is normal
When turning the unit on 1 sense a smell. What should I do?	• First use or incorrect storage of unit at e.g. dusty areas.	• Odor development can arise on first use and after a longer period of non-use by storing in unsuitable areas (e.g. dusty
Compressor does not activate		• Depending on ambient temperatures and unit type it may take approx. 10 minutes after starting the compressor until the cooling/heating capacity is reached.
The unit deactivates		• On reaching the set required temperature, the unit switches off automatically. Check manual setting of the required temperature as well as the TIMER setting.
The unit does not cool correctly		• You achieve the most effective and economical cooling comfort if you already cool the room to be cooled when the room temperature is not yet heated up. Air conditioners operate more effectively if the temperature is maintained. To drastically cool the air in a fully heated room requires much more time and energy.

Kenmore 70089 Air Conditioner Troubleshooting

Problem	Possible Cause	Solution
Unit will not turn on.	• Power cord unplugged.	• Ensure power cord is firmly plugged into outlet.
	• Blown fuse or tripped breaker.	• Replace blown fuse; reset tripped breaker.
	• Electrical power low ("brown out").	• Low voltage protection prevents operation if supply voltage drops below 90 VAC for 115 volt units;
	• Electrical power outage.	171 VAC for 230 volt units. Contact local electric utility if voltage is low.
	• Compressor in 3minute lock-out.	• Contact local electric utility.
		• Wait 3 minutes for compressor start.
Unit repeatedly blows fuse or trips breaker.	• Other devices sharing circuit results in circuit overload.	• Disconnect other devices or move devices to different circuit.
-	• Incorrect fuse size or type.	NOTE: Air conditioners labeled “Use on Single Outlet Circuit Only" require separate, dedicated, circuit.
	• Incorrect circuit breaker size.	• Ensure fuse is correct size. Unit requires time-delay fuses.
	• Extension cord used to provide power.	• Ensure circuit breaker is correct size.
		• Do not use an extension cord with this air conditioner. If power cord on air conditioner does not reach outlet, have qualified electrician move out- let or install new outlet closer to unit.
Unit does not adequately cool room or area.	• Dirty air filter.	• Remove and clean air filter.
	• Optional charcoal air filter (if used) clogged.	NOTE: Do not operate air conditioner with filter removed.
	• Room or area not sealed.	• Replace charcoal filter (if desired). NOTE: Optional charcoal filter can- not be cleaned. Filter must be replaced after three months use.
	• Vent Control in EXHAUST position.	• Close all doors and windows in cooling area. Close all air vents and ducts in area.
	• Airflow to or from unit blocked.	• Vent Control should be in CLOSED position whenever air conditioner is in cooling mode.
	• Unit improperly sized for room or area.	• Remove any obstruction to airflow from air discharge vent or return air vent on unit.
		• Reduce cooling area (close doors or otherwise isolate area).
Unit does not adequately cool room or area.	• Desired temperature set too high.	• Reduce temperature setting to more comfortable level.
	• Excessive heat or moisture in area.	• Close blinds or curtains on windows exposed to direct sunlight. Vent steam from open cooking containers, showers, etc., from cooling area. Avoid use of heat- producing appliances during hottest part of day.
	• Dirty condenser or evaporator coils.	• Clean coils.
Unit runs excessively long.	• Unit replaces older model.	• New high-efficiency compressor runs more frequently, but uses less energy, than older, less efficient models.
Water (condensate) in base pan drips into room.	• Unit improperly installed.	• Depending on model, unit must be installed with slope of V4" to 3 /s" to outside.
Unit noisy.	• Unit improperly installed, causing vibration when operating.	• Review installation procedures. Ensure all mounting hardware is tight and secure.
	• Water noise whenever fan runs.	• Normal, especially during periods of high humidity.
	• Loose screws or parts.	• Remove chassis from outer case. Check for loose or missing screws. Tighten and replace as required.

Lennox air conditioner troubleshooting

Troubleshooting advice that you see below was provided by the intercontinental company Lennox International Inc. The manufacturer of HVAC systems gives expert explanations of the easiest ways to solve the most common problems that occur with its air conditioners. If there’s something wrong with your home appliance, try these solutions and the need to call for service may disappear.

Lennox GCM Series air troubleshooting

Case	Explanation
The air conditioner does not operate.	• Have you made a mistake in timer operation?
	• Has the fuse blown or has the circuit breaker been tripped?
The room has a peculiar odor.	• Check that this is not a damp smell exuded by the walls, carpet, furniture, or cloth items in the room.
It seems that condensation is leaking from the air conditioner.	• Condensation occurs when the airflow from the air conditioner cools the warm room air.
Air conditioner does not operate for about 3 minutes when restarted.	• This is the protector of the mechanism.
	• Wait about three minutes and operation will begin.
Does not cool or heat effectively.	• Is the air filter dirty?
	• Has the temperature been set incorrectly?
	• Are the indoor unit's air inlet or outlet vents obstructed?
The air conditioner operation is noisy.	• For a noise that sounds like water flowing. -This is the sound of freon flowing inside the air conditioner unit.
	• For a noise that sounds like the compressed air releasing into atmosphere.
	• This is the sound of the dehumidifying water being processed inside the air conditioning unit.
Remote control display is faint, or no display at all.	• Are the batteries depleted?
	• Are the batteries inserted in the opposite (+) and (-) directions?
Crack sound is heard.	• This sound is generated by the expansion/constriction of the front panel, etc. due to changes of temperature.

Lennox Swing air troubleshooting

Setting Change is Impossible
Symptoms	Causes	Reason and Disposal
The fan speed can not be changed.	• Check whether the MODE indicated on the display is "AUTO"	When the automatic mode is selected, the air conditioner automatically selects the fan speed.
	• Check whether the MODE indicated on the display is "DRY"	When dry operation is selected. The air conditioner automatically select the fan speed. The fan speed can be selected during "COOL" and "FAN ONLY", and "HEAT'
The Transmission Indicator "A" Never Comes On
The remote control signal is not transmitted even when the ON/OFF button is pushed.	• Check whether the batteries in the remote controller are exhausted.	• The remote control signal is not transmitted, because the power supply is off.
The Display Never Comes On
The TEMP, indicator does not come on.	• Check whether the MODE indicated on the display is "FAN ONLY". FAN ONLY	The temperature cannot be set during fan only operation.
The Display Goes Off
The indication on the display disappears after a lapse of time.	• Check whether the timer operation has come to an end when the OFF TIMER is indicated on the display.	The air conditioner operation stops since the set time elapsed.
The ON TIMER indicators go off after a lapse of certain time.	• Check whether the timer operation is started when the ON TIMER is indicated on the display.	When the time set to start the air conditioner is reached, the air conditioner will automatically start and the appropriate indicator will go off.
The Signal Receiving Tone does Not Sound
No receiving tone sounds from the indoor unit even when the ON/OFF button is pushed.	• Check whether the signal transmitter of the remote controller is properly directed to the receiver of the indoor unit when the ON/OFF button is pushed.	Direct the signal transmitter of the remote controller to the receiver of the indoor unit, and then repeatly push the ON/ OFF button twice.
Buttons on the remote controller don't work.		Press Reset button.

Lennox DUCTAIR II air troubleshooting

Trouble	Cause	Solutions
Unit does not start	Power failure	Wait for the comeback of power
	Power switch is open.	Switch on the power
	Fuse of power switch may have blown	Replace the fuse
	Batteries of remote controller are exhausted	Replace the batteries
	The time si not start-up time you have set.	Wait or cancel the time set
Air flowing normally with low cooling (heating) effect	Temperature is not set correctly	Set the temperature properly
	Door or window is open	Close door or window
	Air filter is blocked with dust or dirtiness	Clean the air filter
	Inlet/oultet of indoor/outdoor units are blocked	Clear all blockages, the restart the operation
	Be in 3 minutes protection of compressor	Wait
Can not change the fan speed setting	Check if the mode display on the LCD is AUTO	The Indoor unit will select fan speed automatically when AUTO mode is selected.
	Check if the mode display on the LCD is DRY	The Indoor unit will select fan speed automatically when the unit is on DRY mode.
The transmission symbol does not flash
Press ON/OFF button, the remote controlling signals can not be transmitted	Check if the remote controller has run out of power	When the battery was out, transmission signals can not be sent.
Temperature display disappear
Temperature display does not light	Check if the mode display on the LCD is FAN ONLY	You can not set the temperature when the unit is on FAN ONLY mode.
The display goes off
The indication on the display disappears after a lapse of time.	Check wether the timer operation has come to an end when OFF TIMER is indicated on the display.	The air conditioner operations stops since the set time elapsed.
The ON TIMER indicators go off after a lapse of certain time	Check wether the timer operation is started when the ON TIMER is indicated on the display.	When the time set to start the air conditioner is reached, the air conditioner will automatically start and the appropriate indicator will go off.
The signal receiving tone does not sound
No receiving tone sounds from the indoor unit even when the ON/OFF button is pushed.	Check wether the signal transmitter of the remote controller is properly directed to the receiver of the indoor unit when the ON/OFF button is pushed.	Direct the signal transmitter of the remote controller to the receiver of the indoor unit, and then repeatly push the ON/OFF button twice.
Buttons on the remote controller don’t work.		Press reset button.

Nordyne Air Conditioner Troubleshooting

Do you have broken Nordyne brand air conditioner? Do not rush to call the repairman and lose your money. You may be able to cope with the Nordyne air conditioner troubleshooting on your own. The tables below provide all the necessary information to identify the problem and fix it without much effort.

Nordyne JS4BD Air Conditioner Troubleshooting

Miswired Module Indication	Recommended Troubleshooting Action
Green LED is not on, module does not power up	Determine if both R and C module terminals are connected. Verify voltage is present at module’s R and C terminals.
Green LED intermittent, module powers up only when compressor runs	Determine if R and Y terminals are wired in reverse. Verify module’s R and C terminals have a constant source.
TRIP LED is on but system and compressor check OK	Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coil falls below 0.5VAC when off.
TRIPLED and ALERT LED flashing together	Verify R and C terminals are supplied with 19-28VAC.
ALERT Flash Code 3 (Compressor Short Cycling) displayed incorrectly	Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coil falls below 0.5VAC when off.
ALERT Flash Code 5, 6 or 7 (Open Circuit, Open Start Circuit or Open Run Circuit) displayed incorrectly	Check that compressor run and start wires are through module’s current sensing holes. Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coil falls below 0.5VAC when off.
ALERT Flash Code 8 (Welded Contactor) displayed incorrectly	Determine if module’s Y terminal is connected. Verify Y terminal is connected to 24VAC at contactor coil. Verify 24VAC is present across Y and C when thermostat demand signal is present. If not, R and C are reverse wired. Verify voltage at contactor coil falls below 0.5VAC when off.

Nordyne R-410A Air Conditioner Troubleshooting

Status LED	Status LED Description	Status LED Troubleshooting Information
Green “POWER”	Module has power	Supply voltage is present at module terminals
Red “TRIP”	Thermostat demand signal Y is present, but compressor is not running	• Compressor protector is open
		• Check for high head pressure
		• Check compressor supply voltage
		• Outdoor unit power disconnect is open
		• Compressor circuit breaker or fuse(s) is open
		• Broken wire or connector is not making contact
		• Low pressure switch open if present in system
		• Compressor contactor has failed open
Yellow “ALERT” Flash Code 1	Long Run Time Compressor is running extremely long run cycles	• Low refrigerant charge
		• Evaporator blower is not running
		— Check blower relay coil and contacts
		— Check blower motor capacitor
		— Check blower motor for failure or blockage
		— Check evaporator blower wiring and connectors
		— Check indoor blower control board
		— Check thermostat wiring for open circuit
		• Evaporator coil is frozen
		— Check for low suction pressure
		— Check for excessively low thermostat setting
		— Check evaporator airflow (coil blockages or return airfilter)
		— Check ductwork or registers for blockage
		• Faulty metering device
		— Check TXV bulb installation (size, location and contact)
		— Check if TXV/fixed orifice is stuck closed or defective
		• Condenser coil is dirty
		• Liquid line restriction (filter drier blocked if present in system)
		• Thermostat is malfunctioning
		— Solenoid plug not connected
		— Y2 not wired at Comfort Alert
		— Check thermostat sub-base or wiring for short circuit
		— Check thermostat installation (location, level)
		• Comfort Alert failure
	System Pressure Trip	• High head pressure
		— Check high pressure switch if present in system
		— Check if system is overcharged with refrigerant
		— Check for non-condensable in system
	Discharge or suction	• Condenser coil poor air circulation (dirty, blocked, damaged)
Yellow “ALERT” Flash Code 2	pressure out of limits	• Condenser fan is not running
		— Check fan capacitor
		— Check fan wiring and connectors
		— Check fan motor for failure or blockage
	Compressor overloaded	• Return air duct has substantial leakage
		• If low pressure switch present in system, check Flash Code 1 information
Yellow “ALERT” Flash Code 3	Short Cycling / Compressor is running only briefly	• Thermostat demand signal is intermittent
		• Low line voltage (contact utility if voltage at disconnect is low)
		• Excessive liquid refrigerant in compressor
		• Compressor bearings are seized
Yellow “ALERT” Flash Code 4	Locked Rotor	• Run capacitor has failed
		• Low line voltage (contact utitlity if voltage at disconnect is low)
		• Check wiring connections
		• Excessive liquid refrigerant in compressor
		• Compressor bearings are seized
		• Measure compressor oil level
Yellow “ALERT” Flash Code 5	Open Circuit	• Outdoor unit power disconnect is open
		• Compressor circuit breaker or fuse(s) is open
		• Compressor contactor has failed open
		— Check compressor contactor wiring and connectors
		— Check for compressor contactor failure (burned, pitted or open)
		— Check wiring and connectors between supply and compressor
		— Check for low pilot voltage at compressor contactor coil
		— High pressure switch is open and requires manual reset
		• Open circuit in compressor supply wiring or connections
		• Unusually longcompressorprotectorresettimeduetoextreme ambient temperature
		• Compressor windings are damaged
		— Check compressor motor winding resistance
Yellow “ALERT” Flash Code 6	Open Start Circuit Current only in run circuit	• Run capacitor has failed
		• Open circuit in compressor start wiring or connections
		— Check wiring and connectors between supply and the compressor S terminal
		• Compressor start winding is damaged
		— Check compressor motor winding resistance
Yellow “ALERT” Flash Code 7	Open run circuit Current only in start circuit	• Open circuit in compressor run wiring or connections
		— Check wiring and connectors between supply and the compressor R terminal
		• Compressor run winding is damaged
		— Check compressor motor winding resistance
Yellow “ALERT” Flash Code 8	Welded Contactor Compressor always runs	• Compressor contactor has failed closed
		• Thermostat demand signal not connected to module
Yellow “ALERT” Flash Code 9	Low Voltage Control circuit <17VAC	• Control circuit transformer is overloaded
		• Low line voltage (contact utility if voltage at disconnect is low)
		• Check wiring connections

Ruud air conditioners troubleshooting

The trademark Ruud (USA) is one of the most famous manufacturers of roof-top air conditioners. Its history began in the 1880, when Edwin Ruud, a young engineer from Norway arrived to the United States and created his first successful automatic water heater. The best practices of Ruud in the manufacture of roof-top units led to a new range of devices with additional features and improved performance. In particular, see the troubleshooting table below to solve possible problems with Ruud equipment.

SYMPTOM	POSSIBLE CAUSE	REMEDY
Unit will not run	• Power off or loose electrical connection	• Check for correct voltage at line voltage connections in condensing unit.
	• Thermostat out of calibration set too high	• Reset.
	• Defective control board	• Check control board diagnostic codes.
	• Blown fuses/tripped breaker	• Replace fuses/reset breaker.
	• Transformer defective	• Check wiring. Replace transformer.
	• High-pressure control open	• Reset. Also see high head pressure remedy. The highpressure control opens at 610 PSIG.
	• Miswiring of communications (communication light on continuously)	• Check communication wiring.
Outdoor fan runs, compressor doesn't	• Run or start capacitor defective	• Replace.
	• Start relay defective	• Replace.
	• Loose connection	• Check for correct voltage at compressor. Check and tighten all connections.
	• Compressor stuck, grounded or open motor winding, open internal overload.	• Wait at least 3 hours for overload to reset. If still open, replace the compressor.
	• Low-voltage condition	• Add start kit components.
Insufficient cooling	• Improperly sized unit	• Recalculate load.
	• Improper indoor airflow	• Check. Should be approximately 400 CFM per ton.
	• Incorrect refrigerant charge	• Charge per procedure attached to unit service panel.
	• Air. noncondensibles, or moisture in system	• Recover refrigerant. Evacuate and recharge. Add filter drier.
Compressor short cycles	• Incorrect voltage	• At compressor terminals, voltage must be ± 10% of nameplate marking when unit is operating.
	• Defective overload protector	• Replace. Check for correct voltage.
	• Refrigerant undercharge	• Add refrigerant.
Registers sweat	• Low indoor airflow	• Increase speed of blower or reduce restriction. Replace air filter.
High head, low vapor pressures	• Restriction in liquid line, expansion device, or filter drier	• Remove or replace defective component.
	• Bad TXV	• Replace TXV.
High head, high or normal vapor pressure Cooling mode	• Dirty outdoor coil	• Clean coil.
	• Refrigerant overcharge	• Correct system charge.
	• Outdoor fan not running	• Repair or replace.
	• Air or noncondensibles in system	• Recover refrigerant. Evacuate and recharge.
Low head, high vapor pressures	• Bad TXV	• Replace TXV.
	• Bad compressor	• Replace compressor.
Low vapor, cool compressor, iced indoor coil	• Low indoor airflow	• Increase speed of blower or reduce restriction. Replace air filter.
	• Operating below 65°F outdoors	• Add Low Ambient Kit.
	• Moisture in system	• Recover refrigerant. Evacuate and recharge. Add filter drier.
High vapor pressure	• Excessive load	• Recheck load calculation.
	• Defective compressor	• Replace.
Fluctuating head and vapor pressures	• TXV hunting	• Check TXV bulb clamp. Check air distribution on coil. Replace TXV.
	• Air or noncondensibles in system	• Recover refrigerant. Evacuate and recharge.
Gurgle or pulsing noise at expansion device or liquid line	• Air or noncondensibles in system	• Recover refrigerant. Evacuate and recharge.
High superheat	Low charge	Check system charge.
(greater than 15°F [-9°C] at coil)	Faulty metering device	Restricted cap tube. TEV (TXV)
		Power element superheat out of adjustment internally
		Foreign matter stopping flow
	High internal load	Hot air (attic) entering return
		Heat source on: miswired or faulty control
	Restriction in liquid line	Drier plugged.
		Line kinked.
	Low head pressure	Low charge
		Operating in low ambient temperatures
	Suction or liquid line subjected to high heat	Hot attic
	source	Hot water line
Low line voltage	Loose wire connections	Check wiring.
	Power company problem, transformer	Have problem corrected before diagnosis continues.
	Undersized wire feeding unit	Correct and complete diagnosis.
High line voltage	Power company problem	Have problem corrected.
High head pressure	Overcharge	Check system charge.
	Dirty heat pump coil	Clean coil.
	Faulty or wrong size heat pump fan motor	Replace fan motor.
	Faulty fan blade or wrong rotation	Replace fan blade.
		Replace with correct rotation motor.
	Recirculation of air	Correct installation.
	Additional heat source	Check for dryer vent near unit.
		Check for recirculation from other equipment.
	Noncondensibles	Recover refrigerant. Evacuate and recharge system.
	Equipment not matched	Correct mismatch.
Short cycling of compressor	Faulty pressure control	Replace pressure control.
	Loose wiring	Check unit wiring.
	Thermostat	Located in supply air stream
		Differential setting too close
		Customer misuse
	TEV	Internal foreign matter
		Power element failure
		Valve too small
		Distributor tube/tubes restricted
	Distributor tube	Restricted with foreign matter
		Kinked
		I.D. reduced from previous compressor failure
	Low charge	Check system charge.
	Low evaporator airflow	Dirty coil
		Dirty filter
		Duct too small or restricted
	Faulty run capacitor	Replace.
	Faulty internal overload	Replace compressor.
Faulty Compressor Valves	Fast equalization/Low pressure difference	Replace compressor and examine system to locate reason.
Voltage present on load side of compressor contactor and compressor won't run	Compressor start components	Check start capacitor.
		Check potential relay.
	Run capacitor	Check with ohmmeter
	Internal overload	Altov/ time to reset.
	Compressor windings	Check for correct ohms.
Voltage present on line side of compressor contactor only	Thermostat	Check for control voltage to contactor coil.
	Compressor control circuit	High-pressure switch
		Low-pressure switch
		Ambient thermostat
		Solid-state protection control or internal thermal sensors
		Compressor timed off/on control or interlock
No voltage on line s»de of compressor contactor	Blown fuses or tripped circuit breaker	Check for short in wiring or unit.
	Improper wiring	Recheck wiring diagram.
Improper voltage	High voltage	Wrong unit
		Power suppty problem
	Low voltage	Wrong unit
		Power suppty problem
		Wiring undersized
		Loose connections
	Single Phasing (3 phase)	Check incoming power and fusing.
Liquid in the compressor shell	Faulty or missing crankcase heater	Replace crankcase heater.
Too much liquid in system	Incorrect piping	Check piping guidelines.
	Overcharge	Check and adjust charge.
Moisture	Poor evacuation on installation or during service	In each case, the cure is the same. Recover refrigerant. Add filter drier, evacuate, and recharge.
High head pressure	Noncondensibles air
Unusual head and suction readings	Wrong refrigerant or mixed refrigerants
Foreign matter copper filings	Copper tubing cuttings
Copper oxide	Dirty copper piping or nitrogen not used when brazing
Welding scale	Nitrogen not used during brazing
Soldering flux	Adding flux before seating copper partway
Excess soft solder	Wrong solder material
Compressor failures	Line tubing too large	Reduce pipe size to improve oil return.
Low suction pressure	Low charge	Check system charge.
	Refrigerant leaks	Repair and recharge.
Cold, noisy compressor Slugging	Dilution of oil with refrigerant	Observe piping guidelines.
Noisy compressor	Migration	Check crankcase heater.
Cold, sweating compressor	Flooding	Check system charge.
Low load	Reduced airflow	Dirty filter
		Dirty coil
		Wrong duct size
		Restricted duct
	Thermostat setting	Advise customer.
Short cycling of	Faulty highor low-pressure control	Replace control.
compressor	Loose wiring	Check all control wires.
	Thermostat	In supply air stream, out of calibration
		Customer misuse
On start-up	Incorrect piping	Review pipe size guidelines.
TEV hunting when running	Faulty TEV	Replace TEV.

Rv Rooftop Air Conditioner Troubleshooting

For Rv Rooftop air conditioner troubleshooting you need to understand the air conditioning system itself. Not always the guide can help, but a good manual, written in plain language, should always be at hand. The table below may let you to determine the cause of failure and also to eliminate it.

SYSTEM HEAT	SYSTEM OFF	SYSTEM COOL	FAN AUTO	FAN	OPERATION
On	Off	On	Off	On	Operation of all components Is stopped
On	Off	On	On	Off	Cooling fan runs continuously. No compressor operation.
On	On	Off	Off	On	Cooling blower and compressor cycle with thermostat.
On	On	Off	On	Off	Cooling blower operates continuously. Compressor cycles with thermostat.
Off	On	On	Off	On	Heating system and blower cycle from thermostat.
Off	On	On	On	Off	Heating system cycles from thermostat. Cooling blower operates continuously.

Vax Air Conditioner Troubleshooting

Failure of an air conditioner can be a serious problem. After all, your performance and general condition depend on a comfortable temperature. Troubleshooting can take a lot of time and money, so it is useful to have on hand a short but complete manual. In case of failure of the Vax AP01 air conditioner the table below will be necessary for you.

Vax AP01 Air Conditioner Troubleshooting

Problem	Solution
Why does my air purifier have no power?	• The plug may not be fully pushed into the electrical socket.
	• Check the fuse in the plug if this needs replacing, always replace with a 5amp fuse.
	• The front cover may not be secure, check the front cover is securely fitted.
	• The filter may not be fitted correctly, check the filter.
	• Timer may have finished, re-set the timer
My fan isn’t turning?	• Fan speed is set to L = Low (Silence Technology®), indicator light will illuminate, change fan speed to desired setting
Why is my air purifier making an excessive noise?	• The air grills may be blocked. Make sure the air grills are free from any obstruction.
	• The filter may need replacing