• 1.

    Switch the microwave off at the mains power and remove the plug.

  • 2.

    Open the door.

  • 3.

    Check that there is no foil on the food and no metal objects inside the microwave.

  • 4.

    Ensure the container / dish that you are cooking food in is microwave safe.

  • 5.

    Check that the wave guide cover is not damaged or covered with food debris.