Error code reference

Coleman Furnace Error Codes

7 error codes documented with diagnostic procedures.

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1 FLASHIgnition failure.2 FLASHCombustion air pressure switch closed; the normally open pressure switch contacts are…3 FLASHCombustion air pressure switch failed to close; the normally open pressure switch contact…4 FLASHLimit switch open; a primary or auxiliary limit switch has opened its normally closed…5 FLASHGas flow detected with no call for heat.RAPID FLASHESReverse line voltage polarity detected; both heating and cooling will be affected.STEADY ONNormal operation; if the LED stays on continuously during a fault condition, it indicates…

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