What does the Worcester Bosch Greenstar Ri F99 fault code mean?
The F99 fault code indicates an issue with the system documentation, which may suggest that the boiler’s internal software or configuration is not aligned with the manufacturer’s specifications. This can lead to operational issues and requires attention to ensure proper functioning.
Common Causes
- Incorrect Installation Documentation: If the installation manual was not followed correctly, it can lead to configuration errors.
- Software Glitch: A temporary software issue or corruption may cause the boiler to misinterpret its settings.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to address this fault, as it may involve complex software adjustments or reconfiguration that should not be attempted without proper training.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F99 fault could be around £150 to £250, primarily due to the need for a qualified engineer to diagnose and rectify the software or documentation issues.