How much does it cost to fix Biasi error code Safety thermostat intervention?

Typical repair cost for the Biasi Safety thermostat intervention fault is £100-£280 including labour.

Safety thermostat intervention High

Biasi Safety thermostat intervention Fault Code

Q: What does the Biasi Safety thermostat intervention fault code mean?

Your boiler has switched itself off to prevent damage because the water inside it has become too hot.

Also written as SAFETYTHERMOSTATINTERVENTION — same fault.

The Biasi Safety thermostat intervention fault code means: your boiler has switched itself off to prevent damage because the water inside it has become too hot.. It appears on 1 Biasi model in our database.

Technical description: Overheat of the primary circuit

Typical repair cost £100-£280 (including labour)

DIY fix possible

Check that all radiator valves are fully openEnsure the boiler pressure is between 1.0 and 1.5 barWait for the boiler to cool down and press the reset button

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Biasi models that show the Safety thermostat intervention fault code

Click a model for the full fault code list and model-specific repair notes.

Antares Combi Repair: £100-£280

Source

Biasi Safety thermostat intervention fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026