Unplug and tape the electric cord to the back of the refrigerator or freezer. Disconnect the ice maker from the water line and drain in advance. Failure to defrost the freezer could result in water damage to your other stored property as leaking occurs.
Thoroughly clean and dry all interior surfaces to prevent mold and mildew buildup. Shelves should be either secured in place or detached and wrapped. Secure the appliance doors during the move, but keep them propped open slightly before leaving them in storage to avoid a moisture build-up that leads to mold. Cover with a drop cloth to prevent the appliance from getting dusty.