Furnace error codes
107 furnace codes from 8 brands. Pick your brand, or search the code from your display.
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Amana furnace codes 11
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 switch
Bryant furnace codes 15
Continuous OffNo power to the control board (LED stays dark)Continuous OnNormal: control board has 24 volt power (LED steady on)Rapid FlashingLine voltage polarity reversed (LED flashing rapidly)11No previous fault code stored12Blower on after power up13Limit circuit lockout14Ignition lockout21Gas heating lockout22Abnormal flame-proving signal (flame sensed with gas valve off)23Pressure switch did not open24Secondary voltage fuse is open31Pressure switch did not close or reopened33Limit circuit fault34Ignition proving failure45Control circuitry lockout
Carrier furnace codes 15
Continuous OffNo power to the control board (LED stays dark)Continuous OnNormal: control board has 24 volt power (LED steady on)Rapid FlashingLine voltage polarity reversed (LED flashing rapidly)11No previous fault code stored12Blower on after power up13Limit circuit lockout14Ignition lockout21Gas heating lockout22Abnormal flame-proving signal (flame sensed with gas valve off)23Pressure switch did not open24Secondary voltage fuse is open31Pressure switch did not close or reopened33Limit circuit fault34Ignition proving failure45Control circuitry lockout
Goodman furnace codes 24
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
Lennox furnace codes 12
1 FlashReverse line voltage polarity or phasing of 120V power2 FlashesImproper earth ground3 FlashesBurner failed to light, or lost flame during heat demand4 FlashesLow flame signal, check flame sensor5 FlashesWatchguard: burner failed to light, exceeded maximum retries or recycles (1 hour lockout)7 FlashesPrimary or secondary limit switch open, or Watchguard: limit open longer than 3 minutes8 FlashesRoll-out switch open9 FlashesPressure switch failed to close or opened during heat demand, inducer on10 FlashesWatchguard: pressure switch opened 5 times during a single heating demand11 FlashesPressure switch stuck closed before the combustion air inducer starts12 FlashesFlame sensed without gas valve energized13 FlashesLow line voltage
Payne furnace codes 15
Continuous OffNo power to the control board (LED stays dark)Continuous OnNormal: control board has 24 volt power (LED steady on)Rapid FlashingLine voltage polarity reversed (LED flashing rapidly)11No previous fault code stored12Blower on after power up13Limit circuit lockout14Ignition lockout21Gas heating lockout22Abnormal flame-proving signal (flame sensed with gas valve off)23Pressure switch did not open24Secondary voltage fuse is open31Pressure switch did not close or reopened33Limit circuit fault34Ignition proving failure45Control circuitry lockout
Rheem furnace codes 5
Trane furnace codes 10
Continuous OffNo power to the control (LED off)Continuous OnControl failure: replace IFC (LED steady on)2 FlashesSystem lockout (retries or recycles exceeded)3 FlashesDraft pressure error4 FlashesOpen high limit device5 FlashesFlame sensed when no flame should be present6 Flashes115 volt power reversed or poor grounding7 FlashesGas valve circuit error8 FlashesLow flame sense signal9 FlashesCheck igniter circuit and line N to 24 VAC common voltage