BoilerFaultCodes F00 High
Boiler Fault Code F00
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F00 appears across 2 boiler brands and 8 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 the ability to read the temperature of the water circulating through your heating system, so it has shut itself down to prevent it from overheating. (As reported on Heatline Monza)
Pick your boiler brand for the F00 fix
Source
Information for the F00 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