Official Whirlpool upright freezer parts

How to deal with excessive frost inside your Whirlpool upright freezer

Some frost inside the freezer is normal, because each time you open the freezer door or lid, warm, moist air enters the freezer and forms frost. But if excessive frost forms quickly inside the freezer, it could be that a damaged lid or door seal is constantly allowing warm, moist air into the cabinet, resulting in excessive frost. Check the door or lid seal and replace the seal if damaged.

A crack in the plastic liner inside the freezer cabinet can also allow warm air into the freezer and cause frost. Check the inner liner and repair any cracks using a liner repair kit.

If you see frost on the evaporator cover in the back of the freezer and the freezer isn't cooling well, then a failure in the automatic defrost system could be causing the frost. If the defrost heating element that melts frost off the evaporator fins fails, frost will cake up on the evaporator and interfere with airflow and cooling in the freezer. A failed defrost bi-metal won't allow current to reach the heater so a failed defrost bi-metal will also cause frost on the evaporator and inhibit cooling in the freezer. A failed defrost timer won't advance into the automatic defrost mode so the defrost heating element would never turn on to melt frost off the evaporator. Check the defrost system if you see frost only on the evaporator cover.

Frequently-replaced parts in Whirlpool upright freezers

• Door switch. The door switch turns the freezer light on and off and monitors door position. Replace the door switch if it doesn't work.
• Door gasket. The door gasket is a flexible seal that attaches to the outer edge of the freezer door to form an air tight seal around the door opening. The door gasket prevents warm, moist air from leaking into the freezer compartment when the door is shut.
• Control panel. The control panel houses the selection buttons and the display for the freezer. The control panel connects to the electronic control board through a wire cable that communicates button presses and display functions.
• Electronic control board. The freezer electronic control board controls the major electro-mechanical components in the freezer. When the electronic control board senses the compressor needs to run to cool the freezer, it sends voltage to the compressor and fans. It then receives input from temperature sensors to monitor the temperatures inside the freezer. With this information, the electronic control board controls the defrost cycle.