What does the Worcester Bosch Greenstar CDi F55 fault code mean?
The F55 fault code indicates an issue with the system controls of the Worcester Bosch Greenstar CDi boiler. This typically suggests a malfunction in the electronic control system, which may prevent the boiler from operating correctly.
Common Causes
- Faulty PCB: The printed circuit board (PCB) may be damaged or malfunctioning, leading to control issues.
- Wiring Issues: Damaged or loose wiring connections can disrupt communication between components, causing the fault code to appear.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and potential safety risks. Attempting DIY repairs without proper knowledge can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F55 fault code is around £200 to £300, primarily due to the potential need for a new PCB and professional labour costs.