How to fix Ideal Logic Max fault code E119

What does the Ideal Logic Max E119 fault code mean?

The E119 fault code on the Ideal Logic Max indicates low water pressure within the heating system. This can prevent the boiler from operating efficiently and may lead to further issues if not addressed promptly.

Common Causes

  • Low Pressure in the System: 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 restore the pressure by locating the filling loop on your boiler and adding water until the pressure gauge reads between 1-1.5 bar. If the pressure drops again quickly, it is advisable to call a Gas Safe Engineer to investigate further.

Estimated Repair Cost (2026 UK Prices)

Repair costs for addressing low water pressure issues typically range from £100 to £200, depending on whether a leak is found and repaired or if components like the pressure relief valve need replacement.