BoilerFaultCodes CH PUMP indicator Fast flash High
Boiler Fault Code CH PUMP indicator Fast flash
Also written as CHPUMPINDICATORFASTFLASH — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code CH PUMP indicator Fast flash appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is struggling to accurately read the temperature of the water flowing into your radiators, which prevents it from heating your home correctly. (As reported on Grant Vortex Eco External Wall Hung)
Pick your boiler brand for the CH PUMP indicator Fast flash fix
Source
Information for the CH PUMP indicator Fast flash 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