What does the Glow-worm Energy F100 fault code mean?
The F100 fault code indicates a communication fault within the central heating (CH) system of the Glow-worm Energy boiler. This typically suggests that there is a problem with the communication between the boiler and the heating controls or components.
Common Causes
- Wiring Issues: Damaged or loose wiring connections can disrupt communication signals.
- Faulty PCB: A malfunctioning printed circuit board (PCB) may fail to process signals correctly, leading to communication errors.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to diagnose and repair this issue, as it may involve electrical components that require professional handling for safety reasons.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F100 fault could be around £150 to £250, primarily depending on whether wiring repairs or a PCB replacement is necessary. The PCB replacement tends to be more expensive due to part costs and labour.