E15 High

Boiler Fault Code E15

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E15 appears across 7 boiler brands and 16 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 the fan that clears exhaust gases, preventing the unit from starting safely. (As reported on Warmhaus Enerwa)

Pick your boiler brand for the E15 fix

Ariston E15 2 models Baxi E15 1 model Biasi E15 4 models ECA E15 4 models Vokera E15 1 model Warmflow E15 3 models Warmhaus E15 1 model

Source

Information for the E15 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