What does the Viessmann Vitodens 200-W F50 fault code mean?
The F50 fault code on the Viessmann Vitodens 200-W indicates a malfunction with the safety thermostat, which is crucial for preventing overheating in the boiler. This fault can lead to the boiler shutting down to protect itself from potential damage.
Common Causes
- Faulty Safety Thermostat: The thermostat may be defective or malfunctioning, causing incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the thermostat can disrupt its function, leading to the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to address this issue, as it involves gas and electrical components that require professional expertise for safety and compliance.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F50 fault code is around £150-£250, which includes the replacement of the safety thermostat and any necessary labour charges. This estimate reflects the cost of parts and the expertise required for safe installation.