BoilerFaultCodes 662 High
Boiler Fault Code 662
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 662 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 is failing to start up because the internal computer responsible for lighting the flame has encountered a fault. (As reported on Worcester Bosch WR325 RSF)
Pick your boiler brand for the 662 fix
Source
Information for the 662 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