What does the Baxi Duo-tec F38 fault code mean?
The F38 fault code on a Baxi Duo-tec boiler indicates a flue gas temperature fault, which suggests that the boiler is detecting an abnormal temperature in the flue system. This can lead to inefficient operation and potential safety hazards if not addressed promptly.
Common Causes
- Blocked Flue: A blockage in the flue can prevent proper venting of exhaust gases, causing temperature readings to rise.
- Faulty Temperature Sensor: A malfunctioning temperature sensor may provide inaccurate readings, triggering the fault code.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that can be dangerous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F38 fault could range from £150 to £300, depending on whether the issue is a simple flue cleaning or requires replacement of the temperature sensor.