What does the Viessmann Vitodens 200-W F46 fault code mean?
The F46 fault code on the Viessmann Vitodens 200-W indicates a problem with the ignition electrode, which is responsible for igniting the gas in the burner. This issue can prevent the boiler from starting or operating efficiently.
Common Causes
- Dirty Ignition Electrode: Accumulation of soot or debris can hinder the electrode’s ability to create a spark.
- Faulty Ignition Electrode: The electrode itself may be damaged or worn out, leading to failure in ignition.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting repairs without proper training and certification can lead to safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the ignition electrode on a Viessmann Vitodens 200-W is around £150 to £200. This includes the cost of the part and labour, reflecting the complexity of the repair and the need for a qualified technician.