What does the Viessmann Vitodens 100-W F61 fault code mean?
The F61 fault code on the Viessmann Vitodens 100-W indicates a problem with the flow rate of the heating system. This typically means that the boiler is not receiving the correct amount of water flow, which can affect its operation and efficiency.
Common Causes
- Blocked Filter: A blockage in the system filter can restrict water flow, leading to the F61 error.
- Pump Failure: If the circulation pump is malfunctioning or has failed, it may not be able to maintain the necessary flow rate.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to diagnose and repair this issue, as it may involve gas or electrical components that require professional handling.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F61 fault could be around £150 to £300, depending on whether a filter cleaning or pump replacement is needed. The cost reflects the complexity of the repair and the need for professional expertise.