What does the Glow-worm Easicom E990 fault code mean?
The E990 fault code on the Glow-worm Easicom indicates a problem with the flue gas pressure sensor, which is responsible for monitoring the pressure of the flue gases. This fault can prevent the boiler from operating safely and efficiently.
Common Causes
- Blocked Flue: A blockage in the flue system can cause incorrect pressure readings, leading to this fault code.
- Faulty Pressure Sensor: The flue gas pressure sensor itself may be malfunctioning or damaged, resulting in inaccurate pressure measurements.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that can be dangerous if handled improperly. Attempting to fix it yourself may void warranties and compromise safety.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E990 fault code is around £150 to £250. This includes the cost of a new flue gas pressure sensor and labour, as it typically requires professional installation to ensure safety and compliance with regulations.