BoilerFaultCodes F.67 High
Boiler Fault Code F.67
Also written as F67 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.67 appears across 2 boiler brands and 59 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's control board is receiving an incorrect electrical signal from the flame sensor, meaning it cannot safely confirm if the burner is lit. (As reported on Vaillant ecoMAX Pro 28E)
Pick your boiler brand for the F.67 fix
Source
Information for the F.67 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 27 April 2026