What does the Viessmann Vitodens 050-W E257 fault code mean?
The E257 fault code indicates a malfunction in the system heating circuit sensor of the Viessmann Vitodens 050-W boiler. This sensor is crucial for monitoring the temperature of the heating circuit, and its failure can lead to inefficient heating or system shutdown.
Common Causes
- Faulty Sensor: The heating circuit sensor may be defective or damaged, leading to incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the sensor can disrupt its functionality and cause the fault code to appear.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and potential gas safety risks. Attempting to fix it yourself could lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the heating circuit sensor is around £150 to £250, depending on the service charge and parts required. This cost reflects the need for professional expertise and the price of the sensor itself.