What does the Viessmann Vitodens 050-W E318 fault code mean?
The E318 fault code on the Viessmann Vitodens 050-W indicates a problem with the system gas line, which may prevent the boiler from receiving the necessary gas supply for operation. This issue can lead to the boiler shutting down to ensure safety.
Common Causes
- Blocked Gas Supply: A blockage in the gas line can restrict the flow of gas to the boiler, triggering the fault code.
- Gas Valve Malfunction: A faulty gas valve may fail to open or close properly, preventing gas from reaching the burner.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to diagnose and repair any issues related to the gas line or gas components, as these can be dangerous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the E318 fault could range from £150 to £300, depending on whether the issue is a simple blockage or requires replacement of the gas valve.