What does the Glow-worm Ultimate E119 fault code mean?
The E119 fault code on the Glow-worm Ultimate boiler indicates low water pressure within the system. This can lead to insufficient heating and hot water supply, requiring immediate attention to restore normal operation.
Common Causes
- Water Leak: A leak in the heating system can cause a drop in water pressure, leading to the E119 fault code.
- Pressure Relief Valve Issue: If the pressure relief valve is faulty or has been activated, it may allow water to escape, resulting in low pressure.
Can I fix it myself? (DIY)
You can attempt to fix low water pressure by checking the pressure gauge on your boiler. If it reads below 1 bar, you can re-pressurise the system using the filling loop. However, if you suspect a leak or if the issue persists, it is crucial to call a Gas Safe Engineer for safety and compliance reasons.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing low water pressure issues, such as replacing a pressure relief valve, is around £150-£200. This includes parts and labour, as the valve is a common component that may need replacement if faulty.