What does the Viessmann Vitodens 050-W E231 fault code mean?
The E231 fault code on the Viessmann Vitodens 050-W indicates a problem with the venturi, which is responsible for measuring the gas flow into the burner. This issue can lead to improper combustion and affect the boiler’s efficiency and safety.
Common Causes
- Blockage in the Venturi: Debris or dirt may obstruct the venturi, preventing accurate gas flow measurement.
- Faulty Pressure Sensor: A malfunctioning pressure sensor can misread the gas pressure, triggering the E231 fault code.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any issues related to gas appliances, including the venturi fault. Attempting to fix it yourself can be dangerous and may void your warranty.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E231 fault code is around £200 to £300, primarily due to the need for professional diagnosis and potential replacement of the venturi or associated components.