What does the Glow-worm Betacom F35 fault code mean?
The F35 fault code on the Glow-worm Betacom indicates a fault with the printed circuit board (PCB). This issue can disrupt the boiler’s operation, leading to heating and hot water failures.
Common Causes
- Electrical Short Circuit: A short circuit within the PCB can cause it to malfunction, triggering the F35 error code.
- Component Failure: Failure of components on the PCB, such as capacitors or relays, can lead to this fault code being displayed.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as working with the PCB involves electrical components that can be dangerous if not handled properly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty PCB on a Glow-worm Betacom is approximately £250 to £350. This includes the cost of the part and labour, reflecting the complexity of the repair and the need for a qualified engineer.