What does the Glow-worm Easicom E340 fault code mean?
The E340 fault code indicates a problem with the central heating (CH) flow switch in the Glow-worm Easicom boiler. This fault typically means that the boiler is unable to detect the flow of water through the heating system, which can prevent it from operating correctly.
Common Causes
- Blocked Flow Switch: Debris or limescale buildup can obstruct the flow switch, preventing it from functioning properly.
- Electrical Fault: A wiring issue or a malfunctioning component within the flow switch can lead to incorrect readings or failure to detect flow.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that can be dangerous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the E340 fault is around £150 to £250, which includes the replacement of the flow switch and associated labour costs. This price reflects the complexity of the repair and the need for a qualified engineer.