Using this start relay is easy. First, make sure your fridge is unplugged for safety. Locate the old start relay on your Danfoss 1/5HP compressor. Gently remove the old relay and then quickly install the new RF923 start relay in its place. Plug your fridge back in and you're good to go. When handling the relay, be careful not to drop it or damage any of its components. As for maintenance, there's not much you need to do. Just keep it clean and free from dust. If you notice any issues with your fridge not starting properly, check the relay to see if it's working. If you're unsure, it's always a good idea to consult a professional.