What does the Glow-worm Ultimate F68 fault code mean?
The F68 fault code indicates a problem with the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This error suggests that the sensor is either malfunctioning or not providing accurate temperature readings.
Common Causes
- Faulty DHW Sensor: The sensor may be damaged or defective, leading to incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the DHW sensor can cause communication failures between the sensor and the boiler’s control board.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a DHW sensor in a Glow-worm Ultimate boiler is around £150. This includes the cost of the part and labour, as sensor replacements typically require professional installation.