E11 High

Boiler Fault Code E11

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E11 appears across 6 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 stopped working because its internal sensors are reporting conflicting temperature readings that don't match up during a self-test. (As reported on Keston C36)

Pick your boiler brand for the E11 fix

Ariston E11 2 models Biasi E11 6 models Keston E11 3 models Vokera E11 1 model Warmflow E11 3 models Warmhaus E11 1 model

Source

Information for the E11 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