BoilerFaultCodes F.69 High
Boiler Fault Code F.69
Also written as F69 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.69 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 a safety-related issue with the internal combustion system and has automatically locked itself out to prevent further operation. (As reported on Viessmann Vitodens 200-W B2KF Combi)
Pick your boiler brand for the F.69 fix
Source
Information for the F.69 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