Freezers should maintain a temperature of 0 F, or about -18 C. This temperature will stop the growth of bacteria but will not kill it. Although the taste of frozen food will deteriorate over time, colder temperatures will preserve flavors longer.
A thermometer should be used to check the temperature of the freezer. The thermometer should be placed near the front of the freezer and checked at least once a week to assure that the freezer is maintaining the proper temperature.
Maintaining Proper Temperature
To maintain proper temperature in the freezer, arrange items in the freezer so that cold air can circulate. Keeping the condenser coils on the back or bottom of the freezer clean will also help the freezer to cool properly and improve the freezer's energy efficiency.