BoilerFaultCodes F.336 High
Boiler Fault Code F.336
Also written as F336 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.336 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has identified that its internal settings do not match the physical components installed, which usually happens after a recent repair or incorrect parameter configuration. (As reported on Vaillant ecoTEC plus)
Pick your boiler brand for the F.336 fix
Source
Information for the F.336 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