What does the Viessmann Vitodens 050-W E304 fault code mean?
The E304 fault code indicates a problem with the system gas pressure sensor in the Viessmann Vitodens 050-W boiler. This sensor is crucial for monitoring gas pressure and ensuring safe operation; a fault may prevent the boiler from functioning correctly.
Common Causes
- Faulty Gas Pressure Sensor: The sensor itself may be defective or malfunctioning, leading to incorrect readings.
- Blocked Gas Supply: A blockage in the gas supply line can cause pressure issues, affecting the sensor’s performance.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer to address 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. This includes the cost of the part and labour, as it requires a qualified engineer to ensure safety and compliance with regulations.