What does the Glow-worm Flexicom F31 fault code mean?
The F31 fault code on a Glow-worm Flexicom boiler indicates a problem with the pressure sensor, which is responsible for monitoring the water pressure within the system. This fault can prevent the boiler from operating correctly, leading to heating and hot water issues.
Common Causes
- Blocked Pressure Sensor: Debris or scale buildup can obstruct the pressure sensor, causing it to malfunction.
- Wiring Issues: Damaged or loose wiring connected to the pressure sensor can lead to incorrect readings and trigger the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working on gas appliances can be dangerous. Attempting to fix the pressure sensor without proper training may lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a faulty pressure sensor on a Glow-worm Flexicom boiler is around £150 to £200. This includes the cost of the part and labour, as pressure sensors typically require professional installation to ensure safety and compliance with regulations.