ER + 25 + Reset High

Boiler Fault Code ER + 25 + Reset

Also written as ER25RESET — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code ER + 25 + Reset appears across 2 boiler brands and 12 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has likely detected a circulation or temperature sensing issue, meaning the water is either not moving correctly or the boiler thinks it is overheating. (As reported on Biasi Parva 24S)

Pick your boiler brand for the ER + 25 + Reset fix

Biasi ER + 25 + Reset 11 models Johnson Starley ER + 25 + Reset 1 model

Source

Information for the ER + 25 + 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