There are a few things you can do to keep your refrigerator cool and efficient this summer. First of all, the temperature should be between 37°F and 40°F. Your freezer should be between 0° and 5°F. If your fridge is empty it will use more energy because it has to work harder to keep cool. Add bottles of water to fill the gap. And, finally, clean the coils in the back of the fridge and vacuum under the bottom front and you will lower those electric bills.