How to fix Ideal Mexico HE fault code F71

What does the Ideal Mexico HE F71 fault code mean?

The F71 fault code on the Ideal Mexico HE indicates a problem with the domestic hot water (DHW) flame, suggesting that the boiler is unable to ignite or maintain a flame for hot water production. This can lead to a lack of hot water supply in the system.

Common Causes

  • Blocked Flue: A blockage in the flue can prevent proper ventilation, leading to flame failure.
  • Faulty Ignition Electrode: If the ignition electrode is damaged or malfunctioning, it may not create a spark to ignite the gas.

Can I fix it myself? (DIY)

It is strongly advised to call a Gas Safe Engineer for any gas or electrical issues, as working on boilers can be dangerous. However, you can check the pressure gauge and reset the boiler if necessary.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for addressing the F71 fault could be around £150 to £250, depending on whether the issue is a simple fix like cleaning the flue or requires part replacement such as the ignition electrode.