What does the Worcester Bosch Greenstar Si F88 fault code mean?
The F88 fault code on the Worcester Bosch Greenstar Si indicates a faulty system configuration, which may arise from incorrect settings or issues with the boiler’s communication with other system components. This can prevent the boiler from operating correctly, leading to heating and hot water failures.
Common Causes
- Incorrect Installation: The boiler may not have been set up according to the manufacturer’s specifications, leading to configuration errors.
- Faulty Wiring: Damaged or loose wiring connections can disrupt communication between the boiler and its components, triggering the F88 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 electrical or gas-related problems that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F88 fault code could be around £150 to £250, depending on whether it involves reconfiguring the system or repairing faulty wiring. This cost reflects the need for professional service and potential parts replacement.