BoilerFaultCodes E01-599 High
Boiler Fault Code E01-599
Also written as E01599 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E01-599 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 internal issue with how heat is transferred between the burner and your water, meaning it has shut itself down to prevent damage. (As reported on Worcester Bosch 24i RSF)
Pick your boiler brand for the E01-599 fix
Source
Information for the E01-599 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