DHW PUMP panel LED flashing fast (2/sec) High

Boiler Fault Code DHW PUMP panel LED flashing fast (2/sec)

Also written as DHWPUMPPANELLEDFLASHINGFAST2SEC — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code DHW PUMP panel LED flashing fast (2/sec) 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 hot water sensor is reporting an error, meaning the system cannot accurately measure the temperature of the water being stored. (As reported on Grant Vortex Blue)

Pick your boiler brand for the DHW PUMP panel LED flashing fast (2/sec) fix

Grant DHW PUMP panel LED flashing fast (2/sec) 1 model

Source

Information for the DHW PUMP panel LED flashing fast (2/sec) 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