What does the Glow-worm Betacom F46 fault code mean?
The F46 fault code on the Glow-worm Betacom indicates a communication fault between the boiler’s control board and other components. This issue can prevent the boiler from operating correctly, leading to heating and hot water failures.
Common Causes
- Wiring Issues: Damaged or loose wiring connections can disrupt communication between the boiler’s components.
- Faulty Control Board: A malfunctioning control board may fail to send or receive signals properly, resulting in the F46 error.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as it involves electrical components that can be dangerous to handle without proper training. Attempting DIY repairs could void your warranty or lead to further damage.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F46 fault could be around £150 to £250, primarily depending on whether wiring repairs or a control board replacement is needed. The control board itself can be expensive, contributing to the overall cost.