Preventing ice buildup in a freezer involves stopping warm air from creeping into the freezer and unclogging the vents and freezer drains. Choosing an ideal place to put the freezer also helps prevent ice buildup.
Stop warm air from getting into the freezer by limiting the amount of time the freezer is left open and ensuring the door is properly closed after every use.
Place the freezer indoors and away from extreme temperatures, such as a hot water heater or a furnace. Too much heat causes the freezer to work harder to maintain cool temperatures, which leads to frosting.
Unclog the vents on the back or bottom of the fridge to prevent air circulation problems that cause frosting.