What does the Worcester Bosch Greenstar Si F59 fault code mean?
The F59 fault code indicates that there are faulty system settings within the boiler’s control system. This can lead to operational issues and may prevent the boiler from functioning correctly.
Common Causes
- Incorrect Configuration: The boiler may have been incorrectly set up during installation or maintenance, leading to this fault code.
- Software Glitch: A temporary software issue or glitch in the boiler’s control system can trigger the F59 fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to address this issue, as it may involve complex system settings that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F59 fault code is approximately £120 to £180. This includes the cost of a qualified engineer to diagnose and rectify the system settings.