What does the Viessmann Vitodens 222-F F73 fault code mean?
The F73 fault code on the Viessmann Vitodens 222-F indicates a problem with system feedback, which typically suggests an issue with the communication between the boiler and its sensors or control unit. This can lead to improper operation of the heating system.
Common Causes
- Faulty Sensor: A malfunctioning temperature or pressure sensor can disrupt feedback signals to the boiler.
- Wiring Issues: Damaged or loose wiring connections can interfere with the communication between components, leading to the F73 fault.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F73 fault could be around £150 to £300, depending on whether a sensor replacement or wiring repair is needed. This estimate includes parts and labour for a qualified engineer.