What does the Worcester Bosch Greenstar CDi F36 fault code mean?
The F36 fault code indicates a problem with the flow switch in the Worcester Bosch Greenstar CDi boiler. This switch is responsible for detecting water flow and ensuring the boiler operates correctly; a fault can lead to heating and hot water issues.
Common Causes
- Blocked Flow Switch: Debris or limescale buildup can obstruct the flow switch, preventing it from functioning properly.
- Electrical Fault: Issues with wiring or connections to the flow switch can lead to incorrect readings or failure of the switch.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting to fix electrical components without proper training can also pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty flow switch in a Worcester Bosch Greenstar CDi boiler is around £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.