What does the Glow-worm Flexicom F42 fault code mean?
The F42 fault code on a Glow-worm Flexicom boiler indicates a problem with the control board, which is responsible for managing the boiler’s operations. This issue can prevent the boiler from functioning correctly, leading to heating and hot water failures.
Common Causes
- Electrical Faults: Issues such as short circuits or damaged wiring can disrupt the control board’s functionality.
- Component Failure: Components on the control board, like relays or capacitors, may fail due to age or manufacturing defects.
Can I fix it myself? (DIY)
It is highly recommended to call a qualified Gas Safe Engineer for this issue, as working on the control board involves electrical components that can be dangerous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty control board on a Glow-worm Flexicom boiler is around £250 to £350. This includes the cost of the part and labour, as control boards can be expensive and require professional installation.