BoilerFaultCodes F.527 High
Boiler Fault Code F.527
Also written as F527 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.527 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's internal computer has lost its correct configuration settings, meaning it no longer knows exactly how to control the heating and hot water components safely. (As reported on Viessmann Vitodens 222-F B2TF)
Pick your boiler brand for the F.527 fix
Source
Information for the F.527 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