BoilerFaultCodes 432 High
Boiler Fault Code 432
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 432 appears across 2 boiler brands and 28 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected a fault with one of its internal temperature sensors, which is preventing the system from heating up safely. (As reported on Ideal Ideal Classic SE15P FF)
Pick your boiler brand for the 432 fix
Source
Information for the 432 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026