What does the Worcester Bosch Greenstar CDi F66 fault code mean?
The F66 fault code on the Worcester Bosch Greenstar CDi indicates a maintenance issue that requires attention. This typically suggests that the boiler has not been serviced or maintained according to the manufacturer’s recommendations.
Common Causes
- Lack of Regular Maintenance: Failure to perform annual servicing can lead to various operational issues, including the F66 fault code.
- Blocked Components: Accumulation of debris or blockages in the system can trigger maintenance alerts, indicating the need for cleaning or servicing.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as it involves safety-critical components. Attempting to fix it yourself may not only void the warranty but also pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F66 fault code is around £150 to £250. This cost typically covers a professional service visit and any necessary maintenance work to ensure the boiler operates safely and efficiently.