Using this Westinghouse upright freezer thermostat is easy. First, make sure your freezer is unplugged. Then, carefully remove the old thermostat and replace it with this new one, aligning the mounting holes which are 54mm apart. Connect the 4.8mm spade terminals properly. After installation, plug your freezer back in. When it comes to maintenance, keep the thermostat clean and free from dust. Avoid any physical damage to the 5.7mm D - shape shaft. If you notice any issues like inaccurate temperature control, don't hesitate to contact us. Remember, this thermostat is suitable for specific Westinghouse and Hisense freezer models, so double - check compatibility before use.