What does the Viessmann Vitodens 200-W F87 fault code mean?
The F87 fault code on the Viessmann Vitodens 200-W indicates a problem with the user alerts system, which may prevent the display of important operational messages. This can affect the boiler’s ability to communicate issues or maintenance needs effectively.
Common Causes
- Software Glitch: A temporary software issue may cause the alerts system to malfunction.
- Faulty Control Board: A defective control board can lead to incorrect signal processing, resulting in the F87 error.
Can I fix it myself? (DIY)
It is recommended to reset the boiler by turning it off and on again. However, if the fault persists, it is crucial to call a Gas Safe Engineer to diagnose and repair any underlying issues safely.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F87 fault could be around £150 to £300, primarily depending on whether a software update or control board replacement is needed.