é2 High

Boiler Fault Code é2

Also written as 2 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code é2 appears across 3 boiler brands and 18 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that water is returning to the unit hotter than when it left, which usually indicates the internal sensors are confused or there is a problem with the way water is circulating. (As reported on Remeha Avanta 18V)

Pick your boiler brand for the é2 fix

Source

Information for the é2 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