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Carrier appliance error codes
Search 2 Carrier diagnostic guides across 1 appliance type. Start with the appliance category or search the code or symptom directly.
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CarrierFurnace
Code 31
Code 31 signals that the furnace draft inducer motor ran, but the pressure switch failed to sense proper negative draft pressure.
CarrierFurnace
Code 33
Code 33 indicates the high-limit switch or rollout switch has tripped due to excessive heat build-up inside the furnace main heat exchanger.