What does the Viessmann Vitodens 111-W F82 fault code mean?
The F82 fault code indicates a problem with the domestic hot water (DHW) feedback system in the Viessmann Vitodens 111-W boiler. This typically means that the boiler is unable to properly detect or regulate the temperature of the hot water supply.
Common Causes
- Faulty DHW Sensor: The sensor responsible for measuring the temperature of the hot water may be malfunctioning or damaged.
- Wiring Issues: Damaged or loose wiring connections between the DHW sensor and the control board can lead to incorrect feedback readings.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and potential gas safety concerns. Attempting to fix it yourself could be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F82 fault code is around £150 to £250, primarily due to the potential need for a new DHW sensor and labour costs associated with a qualified engineer’s visit.