What does the Glow-worm Easicom E850 fault code mean?
The E850 fault code indicates that the flue gas pressure is not responding as expected, which can affect the boiler’s ability to operate safely and efficiently. This issue may arise from blockages or faults in the flue system or pressure sensors.
Common Causes
- Blocked Flue: A blockage in the flue can prevent proper gas flow, leading to pressure issues.
- Faulty Pressure Sensor: A malfunctioning pressure sensor may not accurately detect the flue gas pressure, triggering the fault code.
Can I fix it myself? (DIY)
It is strongly advised 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 addressing the E850 fault could range from £150 to £300, depending on whether the issue is a simple flue cleaning or requires replacement of the pressure sensor.