BoilerFaultCodes F.00 High
Boiler Fault Code F.00
Also written as F00 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.00 appears across 2 boiler brands and 45 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 connection with its internal temperature sensor, meaning it cannot monitor heat levels and has shut down as a safety precaution. (As reported on Vaillant Turbomax Plus 824/828E)
Pick your boiler brand for the F.00 fix
Source
Information for the F.00 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