What does the Viessmann Vitodens 111-W F30 fault code mean?
The F30 fault code on the Viessmann Vitodens 111-W indicates a problem with the control board, which is responsible for managing the boiler’s operations. This issue can lead to the boiler failing to start or operate correctly, affecting heating and hot water supply.
Common Causes
- Electrical Faults: Issues such as short circuits or damaged wiring can disrupt the control board’s functionality.
- Component Failure: Components on the control board, such as relays or capacitors, may fail due to age or manufacturing defects.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any repairs related to the control board, as working with gas and electrical components can be dangerous. Attempting DIY repairs without proper training can lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a faulty control board on a Viessmann Vitodens 111-W is approximately £400 to £600. This includes the cost of the replacement part and labour, as control boards can be expensive and require professional installation.