BoilerFaultCodes E023 High
Boiler Fault Code E023
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E023 appears across 1 boiler brand 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, meaning it cannot safely ignite or maintain its burner to provide you with heating or hot water. (As reported on Vokera Evolve)
Pick your boiler brand for the E023 fix
Source
Information for the E023 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 7 July 2026