What does the Glow-worm Betacom F28 fault code mean?
The F28 fault code on a Glow-worm Betacom boiler indicates that the appliance has failed to detect a flame during operation. This can prevent the boiler from heating water or providing central heating, leading to a lack of hot water or heating in the home.
Common Causes
- Gas Supply Issue: There may be a problem with the gas supply, such as a blockage or shut-off valve that is closed, preventing gas from reaching the burner.
- Flame Sensor Fault: The flame sensor may be dirty or faulty, failing to detect the flame even if it is present, which can trigger the F28 error.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any issues related to gas supply or electrical components. However, you can check the gas supply to ensure it is on and clear of obstructions, but do not attempt to service the boiler yourself.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F28 fault could range from £100 to £250, depending on whether the issue is a simple gas supply adjustment or requires replacement of the flame sensor, which typically costs around £150 including parts and labour.