What does the Glow-worm Ultimate F95 fault code mean?
The F95 fault code indicates a problem with the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This warning suggests that the sensor is either malfunctioning or not providing accurate temperature readings, which can affect the boiler’s ability to heat water effectively.
Common Causes
- DHW Sensor Failure: The sensor may be faulty or damaged, leading to incorrect readings.
- Wiring Issues: Damaged or loose wiring connections to the DHW sensor can disrupt communication between the sensor and the boiler control unit.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to address this issue, as it involves gas and electrical components that require professional expertise for safety and compliance.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the DHW sensor is around £150 to £200, including parts and labour. This cost reflects the price of the sensor and the professional service required for installation.