BoilerFaultCodes Fan or Flue Fault High
Boiler Fault Code Fan or Flue Fault
Also written as FANORFLUEFAULT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Fan or Flue Fault 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 has detected an issue with moving air through the system, so it has safely shut itself down to prevent it from firing up. (As reported on Potterton Suprima HE)
Pick your boiler brand for the Fan or Flue Fault fix
Source
Information for the Fan or Flue 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