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

Typical repair cost for the boiler HIGH WATER TEMPERATURE fault is £150-250 including labour.

HIGH WATER TEMPERATURE Emergency

Boiler Fault Code HIGH WATER TEMPERATURE

Also written as HIGHWATERTEMPERATURE — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code HIGH WATER TEMPERATURE 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 has detected that the water inside is getting too hot and has shut itself down to prevent overheating. (As reported on Potterton Main Mersey Super)

Pick your boiler brand for the HIGH WATER TEMPERATURE fix

Potterton HIGH WATER TEMPERATURE 1 model

Source

Information for the HIGH WATER TEMPERATURE 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