Carrier 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 58STA and 58STX; check the label on your unit to confirm yours.
15 codes across 1 appliance type.
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Carrier furnace codes
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