What does the Glow-worm Flexicom F28 fault code mean?
The F28 fault code on a Glow-worm Flexicom boiler indicates that there is no ignition occurring during the start-up process. This can prevent the boiler from heating water or providing central heating.
Common Causes
- Insufficient Gas Supply: A blockage or issue with the gas supply can prevent the boiler from igniting.
- Faulty Ignition Electrode: If the ignition electrode is damaged or malfunctioning, it may not create the spark needed for ignition.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas-related issues. However, you can check the gas supply to ensure it is on and not blocked, but do not attempt to fix internal components yourself.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F28 fault could be around £150 to £250, depending on whether the issue is a simple gas supply blockage or requires replacement of the ignition electrode.