What does the Glow-worm Easicom E740 fault code mean?
The E740 fault code on a Glow-worm Easicom boiler indicates a flue gas pressure fault, which suggests that the boiler is not able to properly vent exhaust gases. This can lead to unsafe operating conditions and requires immediate attention.
Common Causes
- Blocked Flue: A blockage in the flue system can prevent proper gas venting, causing pressure issues.
- Faulty Pressure Switch: If the pressure switch is malfunctioning, it may not accurately detect the flue gas pressure, triggering the fault code.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and safety components. Attempting to fix it yourself could lead to dangerous situations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an E740 fault could range from £150 to £300, depending on whether the issue is a simple flue cleaning or requires replacement of the pressure switch.