What does the Glow-worm Flexicom F43 fault code mean?
The F43 fault code on a Glow-worm Flexicom boiler indicates a problem with the ignition lead, which is responsible for igniting the gas in the burner. This issue can prevent the boiler from starting up properly, leading to heating and hot water supply interruptions.
Common Causes
- Damaged Ignition Lead: Wear and tear or physical damage to the ignition lead can disrupt the spark needed for ignition.
- Loose Connections: Poor connections between the ignition lead and the ignition electrode can prevent proper functionality.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer to address this issue, as it involves gas and electrical components that can be dangerous if handled improperly. Attempting to fix it yourself may void warranties and pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty ignition lead on a Glow-worm Flexicom boiler is around £120 to £150. This includes the cost of the part and labour, as ignition leads are relatively inexpensive but require professional installation.