What does the Glow-worm Flexicom F98 fault code mean?
The F98 fault code on the Glow-worm Flexicom indicates a communication issue between the boiler’s control board and the user interface. This can result in the boiler being unable to operate correctly, leading to heating and hot water failures.
Common Causes
- Faulty User Interface: A malfunctioning user interface can disrupt communication with the control board.
- Wiring Issues: Damaged or loose wiring connections between the control board and user interface may cause the fault code to appear.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and potential safety risks. Attempting repairs without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F98 fault could be around £150 to £250, primarily due to the need for professional diagnosis and potential replacement of the user interface or wiring.