What does the Glow-worm Flexicom F34 fault code mean?
The F34 fault code on a Glow-worm Flexicom boiler indicates a problem with the pump, which is responsible for circulating water through the heating system. This issue can lead to inadequate heating and may require immediate attention to prevent further damage.
Common Causes
- Blocked Pump: Debris or sludge in the system can obstruct the pump, preventing it from functioning properly.
- Electrical Fault: A malfunctioning electrical component or wiring issue can disrupt the pump’s operation, leading to the F34 error code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working with the pump involves electrical and gas components that can be dangerous if not handled correctly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F34 fault code is around £150 to £250, primarily due to the need for a qualified engineer to diagnose and replace the faulty pump if necessary.