Using this freezer thermostat kit is easy. First, make sure your freezer is unplugged. Then, attach the thermostat to the appropriate location using the provided mounting bracket. Connect the capillary tube in the right place. Put on the universal knob and plug your freezer back in. When it comes to things to note, remember this kit is not for frost - free freezers. Also, check if your freezer has a temperature warning indicator light; if it does, this might not be the right kit for you. For maintenance, keep the thermostat clean and free from dust. You can gently wipe it with a dry cloth from time to time. If you notice any issues, don't hesitate to contact us.