What does the Viessmann Vitodens 222-F F97 fault code mean?
The F97 fault code on the Viessmann Vitodens 222-F indicates that there are faulty system procedures, which may involve issues with the boiler’s internal controls or communication errors within the system. This fault typically requires further diagnostics to identify the specific cause.
Common Causes
- Faulty Sensor: A malfunctioning temperature or pressure sensor can disrupt the boiler’s operation and trigger the F97 fault code.
- Control Board Issue: Problems with the control board, such as software glitches or hardware failures, can lead to incorrect system procedures being executed.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for this fault, as it may involve complex electrical or gas-related issues that require professional expertise to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F97 fault could range from £150 to £300, depending on whether a sensor replacement or control board repair is necessary. This estimate includes parts and labour for a qualified technician.