While Boomerang's point about having a full freezer maintain frozen temps is correct, on a side by side, don't overfill it, or you won't get good airflow, and will quickly kill it. Especially inexpensive units. When I worked for a year, for Navy housing, in Guam, we had Magic Chef side by side units in the houses. Come payday, the Navy wives would go to the commisary, and buy so much food that they'd overstuff their freezers. Next thing you know, we're doing a reefer swap out, because they've fried the unit. Had one that was so overstuffed, you couldn't tell there was a lit bulb in the freezer!