Refrigerator temperatures come automatically set to factory recommendations, which are the proper refrigerator temperature of 37 degrees and the ideal freezer temperature of zero degrees.
These are generally the correct temperatures, but according to Whirlpool Corp., your freezer is set at the correct temperature when the ice cream is firm.
If the freezer is too warm or too cold, first check the air vents to make sure that nothing’s blocking circulation. Then adjust the temperature up or down one setting and allow a full 24 hours for the temperature to adjust.
One level is equal to about 1 degree of temperature, so remember: the higher the freezer temperature, the faster your frozen foods lose their quality. However, colder temperatures also could dry foods out, so try to keep the freezer at the recommended zero degrees.