How much does it cost to fix boiler error code Overheat thermostat (240XP)?

Typical repair cost for the boiler Overheat thermostat (240XP) fault is £120-250 including labour.

Overheat thermostat (240XP) High

Boiler Fault Code Overheat thermostat (240XP)

Also written as OVERHEATTHERMOSTAT240XP — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Overheat thermostat (240XP) 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 it got too hot and has automatically shut itself down for safety, meaning your pilot light has gone out and needs to be relit. (As reported on Alpha 240XE)

Pick your boiler brand for the Overheat thermostat (240XP) fix

Alpha Overheat thermostat (240XP) 1 model

Source

Information for the Overheat thermostat (240XP) 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