What does the Worcester Bosch Greenstar Si F33 fault code mean?
The F33 fault code on the Worcester Bosch Greenstar Si indicates a malfunction with the fan, which is essential for proper combustion and ventilation within the boiler. This issue can lead to the boiler shutting down to prevent unsafe operation.
Common Causes
- Blocked Fan: Debris or obstructions can prevent the fan from spinning freely, leading to a fault.
- Electrical Fault: Issues with the wiring or connections to the fan can disrupt its operation, triggering the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves electrical components and safety risks associated with gas appliances.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F33 fault code is around £150 to £250, which includes parts and labour for replacing the fan or fixing electrical connections. This cost reflects the complexity of the repair and the need for a qualified technician.