What does the Vaillant Home E119 fault code mean?
The E119 fault code on a Vaillant Home boiler indicates low water pressure within the system. This can prevent the boiler from operating efficiently and may lead to further issues if not addressed promptly.
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: A faulty pressure relief valve 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 other complex issues, it is crucial 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 pressure relief valve, is around £150. This includes parts and labour, as this is a common issue that can be resolved relatively quickly by a professional.