What does the Baxi Duo-tec F72 fault code mean?
The F72 fault code on a Baxi Duo-tec boiler indicates a central heating circuit fault, which typically suggests an issue with the flow or return temperature sensors or the pump. This fault prevents the boiler from operating efficiently, leading to heating issues in the home.
Common Causes
- Faulty Temperature Sensors: If the flow or return temperature sensors are malfunctioning, they may not provide accurate readings, causing the boiler to shut down.
- Circulation Issues: Blockages or pump failures in the central heating circuit can restrict water flow, triggering the F72 fault code.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this fault, as it involves gas and electrical components that require professional handling. Attempting DIY repairs could be dangerous and may void your warranty.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F72 fault could be around £150 to £250, depending on whether the issue is with the sensors or the pump. Replacement parts and labour costs contribute to this estimate.