How to fix Worcester Bosch Greenstar Ri fault code F31

What does the Worcester Bosch Greenstar Ri F31 fault code mean?

The F31 fault code on the Worcester Bosch Greenstar Ri indicates a problem with the fan, which is crucial for the combustion process and overall operation of the boiler. This fault typically arises when the fan is not functioning correctly, leading to inadequate airflow and potential safety issues.

Common Causes

  • Blocked Fan: Debris or dust accumulation can obstruct the fan’s operation, preventing it from spinning freely.
  • Electrical Fault: Issues with the wiring or connections to the fan can result in a lack of power, causing the fan to fail.

Can I fix it myself? (DIY)

It is strongly advised to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting to fix electrical or gas-related problems without proper training can lead to serious safety risks.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for the F31 fault, primarily involving fan replacement, is around £250. This includes the cost of the replacement fan and labour, reflecting the complexity of the work involved.