What does the Vaillant ecoTEC plus F97 fault code mean?
The F97 fault code on a Vaillant ecoTEC plus boiler indicates a problem with the system’s best practices, often related to incorrect installation or configuration issues. This fault may prevent the boiler from operating efficiently or safely.
Common Causes
- Incorrect System Setup: The boiler may not be configured correctly for the specific heating system, leading to operational issues.
- Inadequate System Maintenance: Lack of regular servicing can result in performance problems, including blockages or component wear.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer to address this fault, as it may involve complex system configurations and safety checks that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F97 fault could be around £150 to £250, depending on whether adjustments or parts replacement is needed. This cost reflects the complexity of diagnosing and rectifying installation or maintenance issues.