Unplug your refrigerator, and pull it away from the wall so you have access to the rear panel.
Remove the screws located on panel at the bottom of the refrigerator. Remove the panel. Notice the large compressor. Next to it is a metal terminal box. Inside this box is the overload protector.
Unclip the terminal box cover and remove it. You can now see the overload protector connected by two wires.
Unplug the wiring from the ports on the protector. Inspect the wiring for damage. Inspect the terminals for corrosion. If there is wire or terminal damage, you will likely need to have a technician replace the wiring and/or overload protector.