How to fix Baxi Duo-tec fault code F60

What does the Baxi Duo-tec F60 fault code mean?

The F60 fault code on a Baxi Duo-tec boiler indicates a central heating system fault, typically related to the flow temperature being too low or a problem with the heating circuit. This can prevent the boiler from operating efficiently and may require immediate attention.

Common Causes

  • Low Water Pressure: Insufficient water pressure in the system can lead to inadequate heating performance.
  • Faulty Thermistor: A malfunctioning thermistor may incorrectly read the temperature, causing the boiler to shut down.

Can I fix it myself? (DIY)

If you are comfortable, check the water pressure gauge and ensure it is within the recommended range (usually 1-1.5 bar). If the pressure is low, you can top it up using the filling loop. However, for any gas or electrical issues, it is essential to call a Gas Safe Engineer.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for addressing an F60 fault could range from £100 to £250, depending on whether the issue is simply low pressure or requires replacing a thermistor, which typically costs around £150 including parts and labour.