What does the Glow-worm Flexicom F39 fault code mean?
The F39 fault code on a Glow-worm Flexicom boiler indicates a problem with the flue system, which may be causing improper ventilation of combustion gases. This can lead to safety concerns and requires immediate attention to ensure safe operation.
Common Causes
- Blocked Flue: Debris, such as leaves or bird nests, may obstruct the flue, preventing proper exhaust of gases.
- Flue Installation Issues: Incorrect installation or damage to the flue system can lead to inadequate ventilation and trigger the fault code.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to diagnose and repair the flue system issues, as working on gas appliances can be dangerous and requires professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F39 fault could range from £150 to £300, depending on whether the flue needs cleaning or replacement. This cost reflects the need for professional service and potential parts involved.