Using this thermostat kit is easy. First, find the freezer compartment in your refrigerator. Mount the capillary onto the freezer compartment as shown. Then, use the mounting bracket to secure the thermostat in place. Attach the universal knob so you can control the temperature. You can use the on/off switch to turn the thermostat on or off. When using, make sure your hands are dry to avoid any electrical issues. Don't force the knob too hard as it may break. For maintenance, keep the thermostat clean. Wipe it gently with a dry cloth every few months. If you notice any problems, don't try to repair it yourself. Contact our customer service for help.