BoilerFaultCodes Faulty fan High
Boiler Fault Code Faulty fan
Also written as FAULTYFAN — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Faulty fan 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's air circulation system has stopped working because the mechanical unit that pushes air through the vents isn't receiving the correct power to start up. (As reported on Johnson Starley Aquair S 10)
Pick your boiler brand for the Faulty fan fix
Source
Information for the Faulty fan 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