What does the Viessmann Vitodens 050-W E313 fault code mean?
The E313 fault code on the Viessmann Vitodens 050-W indicates a malfunction in the system zone valve, which is responsible for controlling the flow of water to the heating system. This issue can prevent the boiler from operating efficiently, leading to heating problems.
Common Causes
- Faulty Zone Valve Motor: The motor that operates the zone valve may be defective, preventing it from opening or closing properly.
- Wiring Issues: Damaged or loose wiring connections to the zone valve can disrupt its operation, leading to the E313 fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working with gas appliances and electrical components can be dangerous. Attempting to fix the zone valve without proper training may lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the zone valve on a Viessmann Vitodens 050-W is around £250 to £350. This includes the cost of the replacement part and labour, reflecting the complexity of the repair and the need for a qualified technician.