How to fix Glow-worm Easicom fault code E620

What does the Glow-worm Easicom E620 fault code mean?

The E620 fault code indicates a flue gas pressure fault, which suggests that the boiler is not able to properly vent exhaust gases. This can lead to inefficient operation and potential safety hazards if not addressed promptly.

Common Causes

  • Blocked Flue: A blockage in the flue system can prevent proper gas venting, causing pressure issues.
  • Faulty Pressure Sensor: A malfunctioning pressure sensor may incorrectly read the flue gas pressure, triggering the fault code.

Can I fix it myself? (DIY)

It is strongly advised to call a Gas Safe Engineer for this issue, as it involves gas and safety components. Attempting to fix it yourself could pose serious risks.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for addressing the E620 fault could be around £150 to £300, depending on whether the issue is a simple blockage or requires replacement of the pressure sensor.