What does the Viessmann Vitodens 200-W F73 fault code mean?
The F73 fault code on the Viessmann Vitodens 200-W indicates a faulty installation, which may involve issues with the boiler’s setup or configuration. This can lead to operational inefficiencies or safety concerns, necessitating immediate attention.
Common Causes
- Incorrect Flue Installation: If the flue is not installed correctly, it can cause exhaust gases to back up, triggering the fault code.
- Improper Electrical Connections: Faulty wiring or connections can lead to communication errors within the boiler’s control system, resulting in the F73 error.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any installation-related issues, as improper handling can pose serious safety risks. DIY fixes are not recommended for gas or electrical components.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F73 fault could range from £150 to £300, depending on the specific installation issue that needs rectification. This includes the cost of a qualified engineer’s time and any necessary parts.