What does the Glow-worm Ultimate F50 fault code mean?
The F50 fault code indicates a failure of the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This sensor is crucial for accurately measuring the temperature of the water being heated for domestic use.
Common Causes
- Faulty DHW Sensor: The sensor may be malfunctioning or damaged, leading to incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the DHW sensor can cause communication failures, resulting in the F50 error code.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting to fix electrical or gas-related problems without proper training can lead to serious safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated cost for replacing the DHW sensor is around £150 to £200, including parts and labour. This price reflects the complexity of the repair and the need for a qualified engineer to ensure safety and compliance with regulations.