F2 High

Boiler Fault Code F2

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code F2 appears across 14 boiler brands and 63 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 it has detected it is getting too hot, which is usually caused by a lack of water or a circulation problem. (As reported on Viessmann Vitodens 050-W)

Pick your boiler brand for the F2 fix

Baxi F2 1 model Ferroli F2 5 models Glow-worm F2 6 models Heatline F2 9 models Ideal F2 13 models Ikon F2 1 model Keston F2 3 models Potterton F2 1 model Protherm F2 2 models Ravenheat F2 1 model Saunier Duval F2 4 models Viessmann F2 9 models Worcester Bosch F2 7 models Zanussi F2 1 model

Source

Information for the F2 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