Using your Westinghouse bar fridge thermostat is easy. First, make sure your fridge is unplugged before you start any installation. Carefully attach the thermostat using the 3/8 - inch screw mounting. The 500 - millimeter long capillary should be connected to the evaporator as it's designed. Once installed, plug your fridge back in and set the temperature to your desired level. When it comes to maintenance, keep the thermostat clean by gently wiping it with a soft, dry cloth. Avoid using harsh chemicals as they can damage the components. Also, check the connections regularly to ensure they are tight. If you notice any issues like inconsistent temperature control, it might be a good idea to consult a professional technician. Remember, we've been in the business for over 25 years, so you can trust this part to serve you well.