Display shows a generic "Err" or "Error" message and beeps, without a numeric code.

Safety first: Ensure the cooker is cool and depressurized before changing modes or opening the lid.

Try this:

• Cancel and reset: Press Cancel/Stop, unplug for 1–2 minutes, then plug back in.
• Check lid and valves: Make sure the lid is correctly closed for pressure modes and open or in the correct position for non-pressure modes, as specified in the Moulinex manual.
• Verify inner pot: Ensure the original inner pot is installed and seated correctly.
• Select a simple program: Try a basic program like reheat or keep warm with some water in the pot. If it runs normally, the previous error may have been a transient glitch.

If "Err" persists: The unit may have a deeper sensor or control issue. Note the circumstances when the error appears and contact Moulinex support.