What does the Glow-worm Energy F30 fault code mean?
The F30 fault code on a Glow-worm Energy boiler 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 worn out, leading to inaccurate temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the thermistor can cause communication problems with the boiler’s control system.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting to fix electrical components without proper training can also lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a thermistor on a Glow-worm Energy boiler is around £120 to £180. This includes the cost of the part and labour, as thermistor replacement typically requires professional expertise.