BoilerFaultCodes F.395 High
Boiler Fault Code F.395
Also written as F395 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.395 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 electrical fault with its ignition sensor system, meaning it cannot safely confirm if the gas has lit correctly. (As reported on Viessmann Vitodens 222-F B2TF)
Pick your boiler brand for the F.395 fix
Source
Information for the F.395 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