Goodman air troubleshooting

Start troubleshooting your Goodman air conditioning system by consulting the table below. Chances are that you will find the answer to your question here and have the appliance working very soon. If the same issue occurs more than once, make sure the system is properly taken care of. Improper operation and inadequate maintenance often result in air conditioner failures.

Goodman RT6100004R13 air troubleshooting

SymptomFault Description(s)Possible CausesCorrective ActionCautions 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.- Check 230 Vac power at motor.- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor.
- Blown fuse or circuit breaker.- Check low voltage (24 Vac R to C) at motor.- Handle electronic motor/control with care.
- 24 Vac wires misfired.- Check low voltage connections (G, Y. W. R. C) at motor.
- Unseated pins in wiring harness connectors.- Check for unseated pins in connectors on motor harness.
- Bad motor/control module.- Test with a temporary jumper between R - G.
- Moisture present in motor or control module.
- Motor rocks, but won’t start.- Loose motor mount.- Check for loose motor mount.- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor.
- Blower wheel not tight on motor shaft.- Make sure blower wheel is tight on shaft.- Handle electronic motor/control with care.
- Bad motor/control module.- Perform motor/control replacement check. ECM motors only.
- 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.- Check line voltage for variation or “sag".- Turn power OFF prior to repair.
- Unseated pins in wiring harness connectors.- Check low voltage connections (G. Y. W. R. C) at motor, unseated pins in motor harness connectors.
- Erratic CFM command from "BK" terminal.- Check-out system controls - Thermostat.
- Improper thermostat connection or setting.- Perform Moisture Check.
- Moisture present in motor/control module.
- "Hunts" or “puffs" at high CFM (speed).- Incorrect or dirty filter(s).- Does removing panel or filter reduce "puffing"?- Turn power OFF prior to repair.
- Incorrect supply or return ductwork.- Check/replace filter.
- Incorrect blower speed setting.- Check/correct duct restrictions.
- Adjust to correct blower speed setting.
- Motor starts, but runs erratically.- Stays at low CFM despite system call for cool or heat CFM.- 24 Vac wires misfired or loose.- Check low voltage (Thermostat) wires and connections.- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor.
- "R" missing/not connected at motor.- Verify fan is not in delay mode - wait until delay complete.- Handle electronic motor/control with care.
- Fan in delay mode.- Perform motor/control replacement check. ECM motors only.
- Stays at high CFM.- "R" missing/not connected at motor.- Is fan in delay mode? - wait until delay time complete.- Turn power OFF prior to repair. Wait 5 minutes after disconnecting power before opening motor.
- Fan in delay mode.- Perform motor/control replacement check. ECM motors only.- Handle electronic motor/control with care.
- Blower won't shut off.- Current leakage from controls into G, Y, or W.- Check for Triac switched t'stat or solid state relay.- Turn power OFF prior to repair.
- Excessive noise.- Air noise.- High static creating high blower speed.- Check/replace filter.- Turn power OFF prior to repair.
- Incorrect supply or return ductwork.- Check/correct duct restrictions.
- Incorrect or dirty filter(s).
- Incorrect blower speed setting.
- Adjust to correct blower speed setting.
- Noisy blower or cabinet.- Loose blower housing, panels, etc.- Check for loose blower housing, panels, etc.- Turn power OFF prior to repair.
- High static creating high blower speed.- Check for air whistling thru seams in ducts, cabinets or panels.
- Air leaks in ductwork, cabinets, or panels.- Check for cabinet/duct deformation.
- "Hunts" or "puffs" at high CFM (speed).- High static creating high blower speed.- Does removing panel or filter reduce "puffing"?- Turn power OFF prior to repair.
- Incorrect or dirty filter(s).- Check/replace filter.
- Incorrect supply or return ductwork.- Check/correct duct restrictions.
- Incorrect blower speed setting.- Adjust to correct blower speed setting.
- 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.

Goodman PC Series air troubleshooting

SYMPTOMPOSSIBLE CAUSEREMEDY"
High head-low suctiona. Restriction in liquid line or capillary tube or filter driera. Remove or replace defective component
High head-high or normal suctiona. Dirty condenser coila. Clean coil
b. Qverchargedb. Correct system charge
c. Condenser fan not runningc. Repair or replace
Low head-high suctiona. Incorrect capillary tubea. Replace evaporator assembly
b. Defective compressor valvesb. Replace compressor
Unit will not runa. Power off or loose electrical connectiona. Check for unit voltage at contactor in condensing unit
b. Thermostat out of calibration - set too highb. Reset
c. Defective contactorc. Checkfor24voltsatcontactorcoil- replace if contacts are open
d. Blown fuses or breakerd. Replace fuses or reset breaker
e. Transformer defectivee. Check wiring-replace transformer
f. Compressor overload contacts openf. If external overload-replace OL If internal replace compressor. NOTE: Wait at least 2 hours for overload to reset
Condenser fan runs, compressor doesn'ta. Run or start capacitor defectivea. Replace
b. Start relay defectiveb. Replace
c. Loose connectionc. Check for unit voltage at compressor –check tighten all connections
d. Compressor stuck, grounded or open motor winding, open internal overloadd. Wait at Ieast2 hours for overload to reset If still open, replace the compressor
e. Low voltage conditione. Add start kit components
Low suction - cool compressor Iced Evaporator Coila. Low indoor airflow, dirty coil, dirty filters, etc.a. Increase speed of blower or reduce restriction - replace air filter, clean coil, etc.
Compressor short cyclesa. Defective overload protectora. Replace-check for correct voltage
Registers sweata. Low airflowa. Increase speed of furnace blower or reduce restriction- replace air filter or clean coil
High suction pressurea. Excessive loada. Recheck load calculation
b. Defective compressorb. Replace
Insufficient coolinga. Improperly sized unita. Recalculate load
b. Improper airflowb. Check- should be approximately 400 CFM per ton
c. Incorrect refrigerant chargec. Charge per procedure attached to unit service panel
d. Incorrect voltaged. At compressor terminals, voltage must be within 10% of nameplate volts when unit is operating

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