What does the Viessmann Vitodens 200-W F86 fault code mean?
The F86 fault code on the Viessmann Vitodens 200-W indicates a problem with user notifications, which may involve issues with the display or communication between the control unit and the user interface. This fault can prevent the boiler from operating correctly and may require attention to restore normal functionality.
Common Causes
- Faulty User Interface: A malfunction in the user interface or display panel can lead to incorrect notifications being shown.
- Software Glitch: An issue with the boiler’s software may cause it to misinterpret signals, resulting in erroneous fault notifications.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this fault, as it may involve electrical components that require professional expertise. Attempting to fix it without proper knowledge could lead to further issues or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F86 fault code is approximately £150 to £250. This includes potential replacement of the user interface or software updates, which can vary based on the specific issue and labour costs.