What does the Baxi Duo-tec F68 fault code mean?
The F68 fault code on a Baxi Duo-tec boiler indicates a problem with the central heating pressure relief valve. This typically means that the valve is either leaking or has failed, which can lead to pressure issues within the heating system.
Common Causes
- Faulty Pressure Relief Valve: The valve may be stuck open or closed, causing improper pressure regulation.
- Excessive System Pressure: High pressure in the system can cause the relief valve to activate, leading to leaks or failure.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting to fix the pressure relief valve without proper training may lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a pressure relief valve on a Baxi Duo-tec boiler is around £150 to £200. This includes the cost of the part and labour, reflecting the complexity of the repair and the need for a qualified engineer.