BoilerFaultCodes F.29 High
Boiler Fault Code F.29
Also written as F29 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.29 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 has lost its flame while running and cannot manage to restart itself, likely due to a temporary interruption in the gas supply or a component failure. (As reported on Vaillant ecoTEC exclusive)
Pick your boiler brand for the F.29 fix
Source
Information for the F.29 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