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 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has temporarily locked out because it cannot safely detect a flame inside. (As reported on Biasi Advance Plus)

Pick your boiler brand for the Er 25 + RESET fix

Biasi 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 31 August 2026