Trane 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 UH1B040A9241C and DH1B040A9241C; check the label on your unit to confirm yours.
10 codes across 1 appliance type.
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Trane furnace codes
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