What does the Baxi Duo-tec E119 fault code mean?
The E119 fault code on a Baxi Duo-tec 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
- Low Water Pressure: This can occur due to leaks in the 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 fix low water pressure by checking the pressure gauge and using the filling loop to add water to the system until it reaches the recommended level (usually between 1-1.5 bar). If the issue persists or 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 is around £120-£200, depending on whether it involves simply repressurising the system or replacing a faulty component like a pressure relief valve.