E00 High

Boiler Fault Code E00

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E00 appears across 5 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 thinks it sees a flame even though it isn't currently firing, which is a safety conflict that prevents it from starting up. (As reported on Vokera Pinnacle)

Pick your boiler brand for the E00 fix

Alpha E00 1 model Ariston E00 1 model Keston E00 1 model Vokera E00 1 model Worcester Bosch E00 1 model

Source

Information for the E00 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