What does the Glow-worm Easicom E820 fault code mean?
The E820 fault code indicates an open circuit in the flue gas pressure sensor, which can prevent the boiler from operating safely. This issue may arise due to a malfunctioning sensor or problems within the flue system itself.
Common Causes
- Faulty Flue Gas Pressure Sensor: The sensor may be defective or damaged, leading to incorrect readings.
- Blocked Flue: Obstructions in the flue can cause pressure issues, 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 hazardous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the E820 fault could be around £150 to £250, primarily depending on whether the flue gas pressure sensor needs replacement or if there are blockages in the flue that require clearing.