What does the Vaillant ecoTEC plus E119 fault code mean?
The E119 fault code on the Vaillant ecoTEC plus indicates that the boiler has detected low water pressure within the system. This can lead to insufficient heating and hot water supply, necessitating immediate attention to restore proper functionality.
Common Causes
- Low Water Pressure: This can occur due to leaks in the system or insufficient water supply to the boiler.
- Faulty Pressure Relief Valve: A malfunctioning valve may allow water to escape, resulting in a drop in pressure.
Can I fix it myself? (DIY)
You can attempt to fix low water pressure by checking the pressure gauge on your boiler and using the filling loop to add water if necessary. However, if you suspect a leak or if the issue persists, it is crucial to call a Gas Safe Engineer for further diagnosis and repair.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E119 fault could range from £100 to £250, depending on whether it involves simply repressurising the system or replacing a faulty component like the pressure relief valve.