BoilerFaultCodes E00-720 High
Boiler Fault Code E00-720
Also written as E00720 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E00-720 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 fault with the burner unit, meaning it cannot safely ignite or maintain a flame to provide heat or hot water. (As reported on Worcester Bosch 24/28CDi II RSF)
Pick your boiler brand for the E00-720 fix
Source
Information for the E00-720 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