How to fix Ideal Mexico HE fault code F94

What does the Ideal Mexico HE F94 fault code mean?

The F94 fault code on the Ideal Mexico HE boiler indicates a central heating (CH) reset fault. This typically means that the boiler has detected an issue that prevents it from operating correctly, often related to the heating system’s pressure or a component malfunction.

Common Causes

  • Low Water Pressure: Insufficient water pressure in the system can trigger the F94 fault, preventing the boiler from functioning properly.
  • Faulty Components: Issues with internal components such as the pump, thermostat, or circuit board may also lead to this fault code being displayed.

Can I fix it myself? (DIY)

If you are comfortable, check the boiler’s pressure gauge and ensure it is within the recommended range (typically 1-1.5 bar). If the pressure is low, you can re-pressurise the system using the filling loop. However, for any gas or electrical issues, it is crucial to call a Gas Safe Engineer.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving an F94 fault could be around £150-£250, depending on whether it requires a simple pressure adjustment or the replacement of faulty components like the pump or circuit board.