E 11 High

Boiler Fault Code E 11

Also written as E11 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E 11 appears across 5 boiler brands and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal electronic brain has encountered a serious error and is unable to operate safely, causing the system to shut down. (As reported on Vokera Hydra)

Pick your boiler brand for the E 11 fix

Ariston E 11 2 models Chaffoteaux E 11 1 model Ideal E 11 1 model Keston E 11 3 models Vokera E 11 1 model

Source

Information for the E 11 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