What does the Worcester Bosch Greenstar Si F29 fault code mean?
The F29 fault code on the Worcester Bosch Greenstar Si indicates a gas valve fault, which means the boiler is unable to regulate the gas supply properly. This can lead to issues with heating and hot water production.
Common Causes
- Faulty Gas Valve: The gas valve may be malfunctioning or completely failed, preventing gas from reaching the burner.
- Electrical Issues: Problems with the wiring or connections to the gas valve can disrupt its operation, leading to the fault code.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for any issues related to the gas valve, as working with gas appliances can be dangerous. Attempting to fix it yourself could pose serious safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a gas valve replacement on a Worcester Bosch Greenstar Si is around £300 to £400. This includes the cost of the part and labour, as gas valves can be expensive and require professional installation.