How to fix Worcester Bosch Greenstar Ri fault code F26

What does the Worcester Bosch Greenstar Ri F26 fault code mean?

The F26 fault code indicates a malfunction with the temperature sensor in the Worcester Bosch Greenstar Ri boiler. This issue can lead to improper temperature readings, affecting the boiler’s performance and efficiency.

Common Causes

  • Faulty Temperature Sensor: The sensor may be damaged or malfunctioning, causing inaccurate temperature readings.
  • Wiring Issues: Damaged or loose wiring connections to the temperature sensor can disrupt its functionality.

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 components without proper training can also pose risks.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for replacing a faulty temperature sensor in a Worcester Bosch Greenstar Ri boiler is around £150 to £200. This includes the cost of the part and labour, reflecting the complexity of the repair and the expertise required.