BoilerFaultCodes F003 High
Boiler Fault Code F003
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F003 appears across 1 boiler brand and 5 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 the internal gases leaving the system have become too hot, which is a safety feature to prevent damage to the internal components. (As reported on Intergas Xtreme / Xclusive)
Pick your boiler brand for the F003 fix
Source
Information for the F003 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