FAN FAULT High

Boiler Fault Code FAN FAULT

Also written as FANFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code FAN FAULT appears across 4 boiler brands and 11 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 a problem with its internal fan and has shut down as a safety precaution, meaning you will not have any heating or hot water. (As reported on Ideal Vogue Gen2)

Pick your boiler brand for the FAN FAULT fix

Ferroli FAN FAULT 1 model Ideal FAN FAULT 8 models Johnson Starley FAN FAULT 1 model Vokera FAN FAULT 1 model

Source

Information for the FAN FAULT 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