What does the Glow-worm Easicom E940 fault code mean?
The E940 fault code on the Glow-worm Easicom indicates an open circuit in the flue gas pressure sensor. This typically means that the boiler is unable to detect the correct pressure of flue gases, which is crucial for safe operation.
Common Causes
- Blocked Flue: A blockage in the flue system can prevent proper gas flow, leading to pressure issues.
- Faulty Pressure Sensor: The flue gas pressure sensor itself may be malfunctioning or damaged, causing incorrect readings.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for 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 addressing the E940 fault could range from £150 to £300, depending on whether the flue needs cleaning or the pressure sensor needs replacement. This cost reflects the complexity of the work and the need for a qualified technician.