What does the Glow-worm Betacom F23 fault code mean?
The F23 fault code on a Glow-worm Betacom boiler indicates a flame failure, meaning the boiler is unable to detect a flame during operation. This can prevent the boiler from heating water or providing central heating.
Common Causes
- Blocked Flue: A blockage in the flue system can prevent proper ventilation, leading to flame failure.
- Faulty Ignition Electrode: If the ignition electrode is damaged or malfunctioning, it may not ignite the gas properly, resulting in a flame failure.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas or electrical issues, as working on a boiler can be dangerous. However, you can check the pressure gauge and reset the boiler if the pressure is low.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F23 fault could be around £150 to £250, depending on whether the issue is a simple reset or requires replacing parts like the ignition electrode or clearing a flue blockage.