What does the Glow-worm Ultimate F38 fault code mean?
The F38 fault code on the Glow-worm Ultimate indicates a sensor fault, typically related to the temperature or pressure sensors within the boiler. This issue can prevent the boiler from operating efficiently or at all, requiring attention to ensure safe and effective heating.
Common Causes
- Faulty Temperature Sensor: A malfunctioning temperature sensor may provide incorrect readings, leading to the F38 fault code.
- Wiring Issues: Damaged or loose wiring connections to the sensor can disrupt communication, triggering the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves electrical components and safety risks. Attempting to fix it without proper training could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F38 fault code is around £150 to £250, primarily due to the need for a qualified engineer to replace the faulty sensor and ensure all connections are secure.