BoilerFaultCodes F29 High
Boiler Fault Code F29
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F29 appears across 3 boiler brands and 19 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has shut down because a safety component has detected that the internal temperature reached a level high enough to potentially damage the system. (As reported on Saunier Duval Isotwin F30E)
Pick your boiler brand for the F29 fix
Source
Information for the F29 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