How much does it cost to fix boiler error code HIGH WATER FLOW RATE?

Typical repair cost for the boiler HIGH WATER FLOW RATE fault is £120-250 including labour.

HIGH WATER FLOW RATE Medium

Boiler Fault Code HIGH WATER FLOW RATE

Also written as HIGHWATERFLOWRATE — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code HIGH WATER FLOW RATE 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 struggling because the water is moving through it too quickly for it to heat up properly. (As reported on Potterton Main Mersey Super)

Pick your boiler brand for the HIGH WATER FLOW RATE fix

Potterton HIGH WATER FLOW RATE 1 model

Source

Information for the HIGH WATER FLOW RATE 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