What does the Viessmann Vitodens 050-W E349 fault code mean?
The E349 fault code indicates a malfunction with the gas pressure sensor in the Viessmann Vitodens 050-W boiler. This issue can prevent the boiler from operating efficiently and may lead to safety concerns if not addressed promptly.
Common Causes
- Faulty Gas Pressure Sensor: The sensor may be defective or damaged, leading to incorrect pressure readings.
- Blocked Gas Supply: A blockage in the gas supply line can cause fluctuations in pressure, triggering the fault code.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that can be dangerous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the gas pressure sensor is around £150 to £250, depending on the specific part and labour costs involved. This estimate reflects the typical price for parts and professional service in the UK.