What does the Glow-worm Easicom E520 fault code mean?
The E520 fault code indicates that the flue gas pressure switch is not responding, which can prevent the boiler from operating safely. This issue typically arises when the pressure switch fails to detect the correct flue gas pressure, potentially leading to unsafe conditions.
Common Causes
- Blocked Flue: A blockage in the flue system can prevent proper gas flow, causing the pressure switch to fail.
- Faulty Pressure Switch: The pressure switch itself may be defective or malfunctioning, leading to incorrect readings.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that can be dangerous if handled improperly. Attempting DIY repairs could void warranties and pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the E520 fault could range around £150 to £250, primarily depending on whether the pressure switch needs replacement or if there are additional issues such as flue blockages that require attention.