Goodman error codes
This page lists the fault codes this brand documents, with likely causes and a short repair path. The codes apply to model numbers such as GM9S80 and GC9S80; check the label on your unit to confirm yours.
24 codes across 1 appliance type.
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Goodman furnace codes
E0Ignition lockout after repeated failed ignitionE1Pressure switch closed at the start of the heating cycleE2Pressure switch circuit not closedE3Primary limit circuit openE4Flame sensed with no call for heatE5Open fuse or short in low voltage wiringE6Low flame sense signalEbGas valve not energized when it should beECGas valve energized when it should not beE10Grounding fault or poor neutral connectionE11Open rollout switch1 FlashFlame sensed when no flame should be present2 FlashesPressure switch stuck closed or inducer error3 FlashesFirst stage pressure switch stuck closed or inducer error4 FlashesOpen limit switch5 FlashesOpen rollout switch or open fuse detected6 FlashesPressure switch cycle lockout7 FlashesExternal lockout (retries)8 FlashesExternal lockout (recycles)9 FlashesGrounding problem or reversed polarity10 FlashesGas flow with no call for heat11 FlashesLimit switch open, blower failure12 FlashesIgnitor relay failureSteady OnInternal gas valve error, micro and frequency check