What does the Viessmann Vitodens 050-W E133 fault code mean?
The E133 fault code on the Viessmann Vitodens 050-W indicates a failure to ignite the burner. This can prevent the boiler from heating water and providing central heating, leading to a lack of hot water and heating in the property.
Common Causes
- Insufficient Gas Supply: A blockage or issue in the gas supply line can prevent gas from reaching the burner, causing ignition failure.
- Faulty Ignition Electrode: If the ignition electrode is damaged or malfunctioning, it may not create the spark needed to ignite the gas.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any issues related to gas or electrical components. Attempting to fix these problems without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the E133 fault could be around £150 to £300, depending on whether the issue is a simple gas supply blockage or requires replacement of the ignition electrode, which can be more expensive.