How much does it cost to fix boiler error code WATER OVERHEAT THERMOSTAT?

Typical repair cost for the boiler WATER OVERHEAT THERMOSTAT fault is £90-250 including labour.

WATER OVERHEAT THERMOSTAT High

Boiler Fault Code WATER OVERHEAT THERMOSTAT

Also written as WATEROVERHEATTHERMOSTAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code WATER OVERHEAT THERMOSTAT 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 switched itself off because it got too hot and needs a chance to cool down before it can restart safely. (As reported on Ideal Turbo2 24)

Pick your boiler brand for the WATER OVERHEAT THERMOSTAT fix

Ideal WATER OVERHEAT THERMOSTAT 1 model

Source

Information for the WATER OVERHEAT THERMOSTAT 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