ER 11 + RESET High

Boiler Fault Code ER 11 + RESET

Also written as ER11RESET — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code ER 11 + RESET appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler thinks it sees a flame even though it hasn't started yet, which is a safety conflict that prevents it from turning on. (As reported on Johnson Starley Warmcair DW)

Pick your boiler brand for the ER 11 + RESET fix

Biasi ER 11 + RESET 1 model Johnson Starley ER 11 + RESET 1 model

Source

Information for the ER 11 + RESET 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