What does the Viessmann Vitodens 050-W E235 fault code mean?
The E235 fault code indicates a problem with the burner control system of the Viessmann Vitodens 050-W boiler. This typically means that the burner is not operating correctly, which can lead to heating and hot water issues.
Common Causes
- Faulty Burner Control Unit: The control unit may be malfunctioning or damaged, preventing proper operation of the burner.
- Electrical Connection Issues: Loose or corroded electrical connections can disrupt communication between the control unit and the burner.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that can be hazardous if not handled correctly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the E235 fault code is around £300 to £500. This includes the cost of replacing the burner control unit and any necessary electrical repairs, which can be quite complex and labour-intensive.