Using this Supco relay/overload is easy. First, make sure your fridge compressor is within the 1/4HP - 1/3HP (185W - 250W) and 230 - 240VAC range. Refer to the included wiring diagrams to connect it correctly to your compressor. You can use it with a start capacitor if needed. When installing, it should only take a few seconds. As for maintenance, keep it clean and free from dust. If you notice any signs of overheating or it stops working properly, check the wiring first. And always remember, with our 25 - year track record, we're here to support you if you have any issues.