BoilerFaultCodes F.452 High
Boiler Fault Code F.452
Also written as F452 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.452 appears across 1 boiler brand and 4 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 an internal issue with its safety monitoring system and has automatically locked itself out to prevent unsafe operation. (As reported on Viessmann Vitodens 100-W WB1A)
Pick your boiler brand for the F.452 fix
Source
Information for the F.452 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