What does the Baxi Duo-tec F47 fault code mean?
The F47 fault code on a Baxi Duo-tec boiler indicates a flue gas pressure switch fault, which suggests that the boiler is not detecting the correct pressure in the flue system. This can prevent the boiler from operating safely and efficiently.
Common Causes
- Blocked Flue: A blockage in the flue can restrict the flow of exhaust gases, leading to pressure issues.
- Faulty Pressure Switch: The pressure switch itself may be malfunctioning or damaged, failing to provide accurate readings.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any issues related to gas appliances, including the F47 fault. Attempting to fix it yourself can be dangerous and may violate safety regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving a F47 fault could range from £150 to £300, depending on whether the issue is a simple blockage or requires replacement of the pressure switch, which can be more costly.