How much does it cost to fix boiler error code Safety Thermostat?

Typical repair cost for the boiler Safety Thermostat fault is £90-220 including labour.

Safety Thermostat High

Boiler Fault Code Safety Thermostat

Also written as SAFETYTHERMOSTAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code Safety Thermostat appears across 2 boiler brands and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has shut down because it has detected it is getting too hot, usually due to a lack of water flow or a circulation blockage. (As reported on Baxi Bahama 80e / 105e)

Pick your boiler brand for the Safety Thermostat fix

Baxi Safety Thermostat 2 models Potterton Safety Thermostat 1 model

Source

Information for the Safety 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 31 August 2026