BoilerFaultCodes E01-602 High
Boiler Fault Code E01-602
Also written as E01602 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E01-602 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's water circulation pump or its electrical connection has failed, meaning your heating and hot water cannot function because the system can no longer push hot water around your radiators and taps. (As reported on Worcester Bosch 24i RSF)
Pick your boiler brand for the E01-602 fix
Source
Information for the E01-602 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