What does the Glow-worm Energy F65 fault code mean?
The F65 fault code indicates a problem with the domestic hot water (DHW) pressure switch in the Glow-worm Energy boiler. This fault typically means that the pressure switch is either not detecting the correct water pressure or is malfunctioning, preventing the boiler from heating water properly.
Common Causes
- Blocked Pressure Switch: Debris or scale buildup can obstruct the pressure switch, leading to incorrect readings.
- Faulty Pressure Switch: The pressure switch itself may be defective or worn out, causing it to fail to operate correctly.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as working with gas appliances can be dangerous. Attempting to fix it yourself may void warranties or lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a faulty pressure switch on a Glow-worm Energy boiler is around £150 to £200. This includes the cost of the part and labour, as pressure switches are relatively inexpensive, but professional installation is necessary for safety and compliance.