Refrigerator/freezer compressor start device and capacitor. The start device and capacitor provides a boost of power to the compressor during start-up. If the start capacitor isn’t working, the compressor may not start.
Refrigerator start device. Comes with installation instructions. The provided instructions cover most models. If the instructions are not applicable to your model, a repair technican may need to install this part.
Refrigerator compressor start relay. If the refrigerator does not cool at all, the compressor may not be running. If it’s not running then the start relay may be defective.