What does the Worcester Bosch Greenstar i F87 fault code mean?
The F87 fault code on the Worcester Bosch Greenstar i indicates a problem with the system’s replacements, typically related to components that may have been incorrectly installed or are malfunctioning. This fault can prevent the boiler from operating efficiently or safely.
Common Causes
- Incorrect Installation: If system replacements were not installed according to manufacturer specifications, it can lead to the F87 fault code.
- Faulty Components: Components such as pumps, valves, or sensors may be defective or incompatible, triggering this fault.
Can I fix it myself? (DIY)
It is highly recommended to call a qualified Gas Safe Engineer to diagnose and repair this fault, as it involves critical components of the heating system that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F87 fault could range from £150 to £300, depending on whether faulty components need replacement or if installation issues need rectification. This cost reflects the complexity of the repairs and the need for professional service.