What does the Worcester Bosch Greenstar Si F26 fault code mean?
The F26 fault code on the Worcester Bosch Greenstar Si indicates a malfunction with the temperature sensor, which is responsible for monitoring the water temperature within the system. This issue can lead to improper heating performance and may require immediate attention to ensure safe operation.
Common Causes
- Faulty Temperature Sensor: The sensor itself may be defective or damaged, leading to inaccurate readings.
- Wiring Issues: Damaged or corroded wiring connections to the sensor can disrupt its functionality, causing the fault code to appear.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working with gas appliances requires professional expertise. Attempting to fix electrical or gas-related problems without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty temperature sensor on a Worcester Bosch Greenstar Si is approximately £150 to £200. This includes the cost of the part and labour, reflecting the complexity of the repair and the need for a qualified technician.