What does the Glow-worm Energy F63 fault code mean?
The F63 fault code on the Glow-worm Energy boiler indicates a fault with the domestic hot water (DHW) thermostat. This issue typically prevents the boiler from heating water effectively, leading to inadequate hot water supply.
Common Causes
- Faulty DHW Thermostat: The thermostat may be malfunctioning or damaged, causing incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the thermostat can disrupt its function and lead to the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional handling for safety reasons.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F63 fault is around £150 to £250, primarily for the replacement of the DHW thermostat and any necessary wiring repairs. This cost reflects the complexity of the repair and the need for a qualified technician.