BoilerFaultCodes FWER High
Boiler Fault Code FWER
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code FWER appears across 1 boiler brand and 7 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 chips are failing to communicate because their software versions do not match, preventing the system from operating. (As reported on Vokera Pinnacle System)
Pick your boiler brand for the FWER fix
Source
Information for the FWER 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