BoilerFaultCodes F.432 High
Boiler Fault Code F.432
Also written as F432 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.432 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has switched off for safety because it cannot correctly detect the speed of the fan responsible for clearing exhaust gases. (As reported on Viessmann Vitodens 100-W WB1A)
Pick your boiler brand for the F.432 fix
Source
Information for the F.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 7 July 2026