BoilerFaultCodes F.797 High
Boiler Fault Code F.797
Also written as F797 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.797 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that the water pump responsible for circulating heat around your home and to your taps has stopped working correctly. (As reported on Viessmann Vitodens 222-F B2TF)
Pick your boiler brand for the F.797 fix
Source
Information for the F.797 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