What does the Baxi Duo-tec F86 fault code mean?
The F86 fault code on a Baxi Duo-tec boiler indicates a central heating installation fault. This typically suggests an issue with the system’s configuration or components that affects the heating operation.
Common Causes
- Incorrect System Setup: The boiler may not be properly configured for the specific heating system, leading to communication issues.
- Faulty Wiring or Connections: Damaged or loose electrical connections can disrupt the signals between the boiler and the heating system.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this fault, as it may involve complex electrical or gas-related issues that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F86 fault could range from £150 to £300, depending on whether it involves reconfiguring the system or repairing faulty wiring.