What does the Viessmann Vitodens 050-W E225 fault code mean?
The E225 fault code on the Viessmann Vitodens 050-W indicates a problem with the air separator, which is responsible for removing air from the heating system. This issue can lead to reduced efficiency and potential damage if not addressed promptly.
Common Causes
- Blocked Air Separator: Debris or sludge can accumulate in the air separator, preventing it from functioning correctly.
- Faulty Sensor: A malfunctioning sensor that monitors the air separator may incorrectly trigger the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to address this issue, as it involves gas and electrical components that require professional expertise for safety and compliance.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the E225 fault code is around £150 to £250, which includes the cost of a new air separator and labour. This price reflects the complexity of the repair and the need for a qualified technician.