What does the Viessmann Vitodens 200-W F41 fault code mean?
The F41 fault code on the Viessmann Vitodens 200-W indicates a malfunction with the flue gas sensor, which is responsible for monitoring the exhaust gases produced by the boiler. This issue can lead to improper combustion and potentially unsafe operating conditions.
Common Causes
- Sensor Failure: The flue gas sensor may have failed due to age, wear, or manufacturing defects.
- Blockage in Flue System: A blockage in the flue system can cause incorrect readings from the sensor, leading to the fault code being triggered.
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 hazardous if not handled correctly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the flue gas sensor on a Viessmann Vitodens 200-W is around £250 to £350. This includes the cost of the part and labour, as sensor replacement typically requires professional expertise.