BoilerFaultCodes Safety thermostat intervention High
Boiler Fault Code Safety thermostat intervention
Also written as SAFETYTHERMOSTATINTERVENTION — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Safety thermostat intervention 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 to prevent damage because the water inside it has become too hot. (As reported on Biasi Antares Combi)
Pick your boiler brand for the Safety thermostat intervention fix
Source
Information for the Safety thermostat intervention 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