Using this freezer thermostat is easy. First, make sure your freezer is unplugged. Then, find the old thermostat and remove it carefully. Align the mounting holes of the new thermostat (which are 55mm apart) with the holes in your freezer and secure it. Connect the wires to the 6.4mm spade terminals. Plug your freezer back in and it should work properly. When it comes to maintenance, keep the thermostat clean. You can use a soft, dry cloth to wipe it. If you notice any issues like inaccurate temperature readings, don't try to fix it yourself. Contact a professional. Always handle the capillary (which is 300mm long with a coiled end) gently to avoid damage. With proper use and care, this thermostat will serve you well for a long time.