E65 High

Boiler Fault Code E65

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E65 appears across 3 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is unable to blow out the waste gases properly because the fan is not spinning fast enough to stay safe. (As reported on Vokera Pinnacle)

Pick your boiler brand for the E65 fix

Biasi E65 3 models Johnson Starley E65 1 model Vokera E65 1 model

Source

Information for the E65 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