Boiler Overheat Thermostat High

Boiler Fault Code Boiler Overheat Thermostat

Also written as BOILEROVERHEATTHERMOSTAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Boiler Overheat Thermostat appears across 2 boiler brands and 4 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 it needs to cool down before it can be restarted. (As reported on Ideal Mexico Super CF3 40-80)

Pick your boiler brand for the Boiler Overheat Thermostat fix

Ideal Boiler Overheat Thermostat 3 models Worcester Bosch Boiler Overheat Thermostat 1 model

Source

Information for the Boiler 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