What does the Vaillant ecoTEC exclusive E119 fault code mean?
The E119 fault code indicates that the boiler has detected low water pressure in the system. This can prevent the boiler from operating efficiently and may lead to further issues if not addressed promptly.
Common Causes
- Low Water Pressure: This can occur due to leaks in the heating system or insufficient water supply.
- Faulty Pressure Relief Valve: A malfunctioning valve may allow water to escape, leading to a drop in pressure.
Can I fix it myself? (DIY)
You can attempt to restore the water pressure by locating the filling loop and adding water to the system until the pressure gauge reads between 1 and 1.5 bar. If the issue persists or if you suspect a leak, it is advisable to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing low water pressure issues, such as replacing a faulty pressure relief valve, is around £150. This includes parts and labour, as this is a common issue that can be resolved relatively quickly.