Boiler Fault Code DHW PUMP indicator FLASHING

Also written as DHWPUMPINDICATORFLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code DHW PUMP indicator FLASHING appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having trouble communicating with one of its internal temperature sensors, which means it has stopped providing hot water as a safety precaution. (As reported on Grant Vortex Eco)