BoilerFaultCodesAlpha 32 Fault Code
The Alpha 32 fault code means: your boiler's internal thermometer is malfunctioning, meaning the system can no longer accurately read the temperature of the water returning from your radiators to safely manage the burner.. It appears on 4 Alpha models in our database.
Technical description: Primary return temperature sensor fault (short circuited)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Alpha models that show the 32 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Alpha 32 fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026