What does the Glow-worm Ultimate F30 fault code mean?
The F30 fault code on the Glow-worm Ultimate indicates a thermistor fault, which typically means that the temperature sensor is malfunctioning or has failed. This can lead to incorrect temperature readings and affect the boiler’s operation.
Common Causes
- Faulty Thermistor: The thermistor may be damaged or have an open circuit, preventing it from accurately measuring temperature.
- Wiring Issues: Damaged or loose wiring connections to the thermistor can disrupt its functionality, leading to the F30 fault code.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to address this issue, as it involves electrical components and safety risks. Attempting to fix it yourself may void warranties or lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F30 fault code is around £150 to £200. This includes the replacement of the thermistor and any necessary wiring repairs, which are common issues that require professional attention.