BoilerFaultCodes CH light flashing Low
Boiler Fault Code CH light flashing
Also written as CHLIGHTFLASHING — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code CH light flashing appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is currently taking a mandatory rest period to prevent the system from overheating, and it will attempt to restart automatically once the internal temperature has dropped. (As reported on Worcester Bosch 28 RSF)
Pick your boiler brand for the CH light flashing fix
Source
Information for the CH light flashing 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