What does the Viessmann Vitodens 050-W E315 fault code mean?
The E315 fault code indicates a problem with the system air separator in the Viessmann Vitodens 050-W boiler. This issue can lead to inadequate separation of air from the heating system, potentially causing operational inefficiencies or system failures.
Common Causes
- Blocked Air Separator: Debris or sludge accumulation can obstruct the air separator, preventing it from functioning correctly.
- Faulty Air Separator: The air separator itself may be defective or damaged, leading to improper air removal from the system.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and safety components. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty air separator in a Viessmann Vitodens 050-W is around £250 to £350. This includes parts and labour, as the air separator is a critical component that requires professional handling.