Thermostat Control This test evaluates a fridge’s ability to reach a set temperature and how well it maintains the desired temperatures in the fresh-food and freezer compartments.

Periodically check the thermostat to ensure it stays below 40 degrees. Test the Gaskets The gaskets around the refrigerator’s door help keep the cool air inside the appliance.

Okay, how to prevent ice formation in the freezer? Both the refrigerator and freezer should be cleaned frequently. Check the temperature of your refrigerator and freezer regularly.