What does the Glow-worm Flexicom F45 fault code mean?
The F45 fault code on the Glow-worm Flexicom indicates a problem with the heat exchanger, which may be due to blockages or scaling. This issue can prevent the boiler from heating water efficiently, leading to reduced performance.
Common Causes
- Blockage: Debris or sludge build-up in the heat exchanger can restrict water flow, causing overheating and triggering the fault code.
- Scaling: Hard water can lead to limescale deposits in the heat exchanger, reducing its efficiency and potentially causing overheating.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working on the heat exchanger involves gas and electrical components that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a faulty heat exchanger on a Glow-worm Flexicom is around £400 to £600. This includes parts and labour, as the heat exchanger is a significant component that requires skilled installation.