What does the Glow-worm Flexicom F36 fault code mean?
The F36 fault code on a Glow-worm Flexicom boiler indicates a problem with the thermistor, which is responsible for measuring the temperature of the water in the system. A faulty thermistor can lead to incorrect temperature readings, causing the boiler to operate inefficiently or shut down entirely.
Common Causes
- Faulty Thermistor: The thermistor may be damaged or malfunctioning, leading to inaccurate temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the thermistor can prevent it from functioning correctly.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair the issue, as working on gas appliances can be dangerous and requires professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty thermistor on a Glow-worm Flexicom boiler is approximately £120 to £180. This includes the cost of the part and labour, as thermistor replacements typically require professional installation.