What does the Worcester Bosch Greenstar CDi F64 fault code mean?
The F64 fault code indicates a communication error within the boiler’s internal components, often related to the control board or sensors. This issue can prevent the boiler from operating correctly, leading to heating or hot water failures.
Common Causes
- Control Board Failure: A malfunctioning control board can disrupt communication between the boiler’s components.
- Wiring Issues: Damaged or loose wiring connections can lead to communication failures, affecting the overall operation of the boiler.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and safety risks. Attempting to fix it yourself may void warranties or lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F64 fault could range from £150 to £300, depending on whether the control board needs replacing or if wiring repairs are necessary. This cost reflects the complexity of the issue and the need for professional expertise.