What does the Viessmann Vitodens 050-W E265 fault code mean?
The E265 fault code indicates a malfunction in the system heating circuit pump of the Viessmann Vitodens 050-W boiler. This issue can prevent the circulation of hot water, leading to inadequate heating performance.
Common Causes
- Blocked Pump: Debris or sediment may be obstructing the pump, preventing it from operating effectively.
- Electrical Fault: A failure in the electrical components, such as wiring or the pump motor, can lead to a lack of power supply to the pump.
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 safety risks. Attempting DIY repairs could void warranties or lead to further damage.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the heating circuit pump replacement is around £300 to £450, which includes parts and labour. This cost reflects the complexity of the repair and the need for a qualified technician.