What does the Viessmann Vitodens 200-W F49 fault code mean?
The F49 fault code on the Viessmann Vitodens 200-W indicates a malfunction with the temperature limiter, which is a safety device designed to prevent overheating. This fault can lead to the boiler shutting down to protect itself from potential damage.
Common Causes
- Faulty Temperature Limiter: The temperature limiter itself may be defective or malfunctioning, causing it to trigger the fault code.
- Overheating Issues: If the boiler is experiencing overheating due to poor circulation or a blocked heat exchanger, it may cause the temperature limiter to activate.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves safety-critical components. Attempting to fix gas or electrical issues without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F49 fault code is approximately £150 to £250. This includes the cost of replacing the temperature limiter and any necessary labour charges from a qualified engineer.