BoilerFaultCodes E01-591 Emergency
Boiler Fault Code E01-591
Also written as E01591 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E01-591 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 an issue with the way fuel is being supplied to the burner, which means it has safely shut itself down to prevent it from running incorrectly. (As reported on Worcester Bosch 24i RSF)
Pick your boiler brand for the E01-591 fix
Source
Information for the E01-591 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