What is the optimal temperature setting in a refrigerator freezer?

The recommended temperature setting for a freezer is between 0 and 5 degrees Fahrenheit. It may be best to set a refrigerator's freezer at a slightly warmer temperature than a stand-alone freezer.

An individual can check the freezer’s temperature by using an appliance thermometer. The thermometer should be set in the freezer between items and checked after 24 hours. The freezer’s temperature should be checked periodically.

For optimal air circulation and freezer operation, the individual should ensure that the freezer contents are not very crowded. When air circulation is hindered, the freezer must exert more effort to keep food cold.