BoilerFaultCodes F0 278 High
Boiler Fault Code F0 278
Also written as F0278 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F0 278 appears across 1 boiler brand and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's internal computer is having trouble communicating with its temperature sensors, which means it cannot safely monitor the water temperature and has shut down as a precaution. (As reported on Worcester Bosch 24 RSF)
Pick your boiler brand for the F0 278 fix
Source
Information for the F0 278 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