Removing a built-in microwave oven is actually a much simpler process than installing one. When removing the oven, you do not need to take exact measurements and install a mounting plate as you did when you installed it. However, you should have at least one person to help you remove the microwave, as these appliances can be fairly heavy, and you run the risk of dropping the microwave if you attempt this procedure without assistance.
Unplug the microwave from the outlet.
Ask your helper to stabilise the microwave by holding on to the bottom of it.
Turn the screwdriver counterclockwise to unscrew the screws that are located inside the cabinet. Continue to unscrew the screws until they are no longer inside the top of the microwave. Pull the screws upward through the holes in the cabinet and set them aside.
Ask your helper to tilt the front of the microwave forward slightly.
Push firmly on the back of the microwave to remove the appliance from the slots at the bottom of the metal mounting plate. For best results, push with one hand and stabilise the microwave with the other hand. Once you've freed the appliance from the slots, set it down.