What does the Viessmann Vitodens 050-W E345 fault code mean?
The E345 fault code indicates a problem with the outdoor sensor of the Viessmann Vitodens 050-W boiler. This sensor is crucial for measuring the outdoor temperature, which helps the boiler adjust its operation accordingly.
Common Causes
- Faulty Outdoor Sensor: The sensor may be malfunctioning or damaged, leading to incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections between the sensor and the boiler can disrupt communication, causing the fault code to appear.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair the issue, especially if it involves electrical components or gas systems. Attempting to fix it yourself may pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the outdoor sensor is around £150 to £200, including parts and labour. This cost reflects the price of the sensor and the professional service required for installation.