BoilerFaultCodes E01-946 High
Boiler Fault Code E01-946
Also written as E01946 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E01-946 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 a component is physically secured, which is preventing it from operating safely. (As reported on Worcester Bosch 24i RSF)
Pick your boiler brand for the E01-946 fix
Source
Information for the E01-946 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