What does the Viessmann Vitodens 050-W E302 fault code mean?
The E302 fault code indicates a problem with the heating circuit sensor in the Viessmann Vitodens 050-W boiler. This sensor is responsible for monitoring the temperature of the heating system, and a fault may 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 to diagnose and repair the issue, as working with gas appliances can be dangerous. Attempting to fix electrical or gas-related issues without proper training can lead to serious safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the heating circuit sensor is approximately £150 to £250. This includes the cost of the part and labour, as sensor replacement typically requires professional expertise.