What does the Glow-worm Ultimate F31 fault code mean?
The F31 fault code on the Glow-worm Ultimate indicates a pump fault, which typically means that the central heating pump is not functioning correctly. This can lead to inadequate circulation of water within the heating system, resulting in heating issues.
Common Causes
- Blocked Pump: Debris or sludge may be obstructing the pump, preventing it from operating effectively.
- Electrical Fault: There may be an issue with the electrical supply to the pump, such as a blown fuse or faulty wiring.
Can I fix it myself? (DIY)
While some basic checks can be performed, such as ensuring the pump is not blocked, it is strongly advised to call a Gas Safe Engineer for any repairs related to gas or electrical components to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing an F31 fault could range from £150 to £300, depending on whether the pump needs cleaning, repair, or replacement. This cost reflects the complexity of the work and the need for a qualified technician.