é5 High

Boiler Fault Code é5

Also written as 5 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code é5 appears across 2 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is failing to detect a flame after several attempts, which means it has locked itself out for safety. (As reported on Remeha Avanta 18V)

Pick your boiler brand for the é5 fix

Biasi é5 2 models Remeha é5 3 models

Source

Information for the é5 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