How to fix Ideal Mexico HE fault code E119

What does the Ideal Mexico HE E119 fault code mean?

The E119 fault code on the Ideal Mexico HE boiler indicates low water pressure within the system. This can lead to inadequate heating and potential damage 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, resulting in decreased pressure.

Can I fix it myself? (DIY)

You can attempt to restore the water pressure by locating the filling loop and carefully adding water to the system until it reaches the recommended pressure level (typically 1-1.5 bar). If you are unsure or if the issue persists, 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, could be around £150 to £250. This includes parts and labour, reflecting the complexity of the repair and the need for a qualified engineer.