Using this compressor PTC relay and overload cutout kit is easy. First, make sure your fridge is unplugged for safety. Then, find the old relay and overload in your fridge. It's usually near the compressor. Take out the old parts and connect the new ones in place. It should only take a few seconds. When using this product, always ensure your fridge is operating within the 115 - 127VAC voltage range. Don't try to force the parts if they don't fit properly. For maintenance, keep the area around the relay and overload clean. Check them every few months to make sure there are no signs of overheating or damage. If you notice any issues, stop using the fridge and get in touch with a professional.