BoilerFaultCodes F41 High
Boiler Fault Code F41
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F41 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's internal computer is confused because its internal temperature sensors are either disconnected or are reading temperatures that suggest they have been installed in the wrong positions. (As reported on Ferroli Arena 30 C)
Pick your boiler brand for the F41 fix
Source
Information for the F41 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