BoilerFaultCodes E80-450 High
Boiler Fault Code E80-450
Also written as E80450 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E80-450 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 detected a failure with the internal gas control valve, meaning it cannot safely ignite to provide heating or hot water. (As reported on Worcester Bosch 24/28CDi II RSF)
Pick your boiler brand for the E80-450 fix
Source
Information for the E80-450 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