Freezer: Frost inside

Some frost is normal, because each time you open the freezer; 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, door seal or inner liner is constantly allowing warm, moist air into the cabinet, resulting in excessive frost.

These repairs may help solve your Freezer problem:

Replace the freezer door or lid gasket

Lid gasket

The door seal attaches to the door panel of an upright freezer and the lid seal mounts to the lid of a chest freezer. The seal prevents air from entering or escaping the freezer when the door or lid is shut. A damaged seal lets warm, moist air into the freezer when the door or lid is closed, causing excessive frost and cooling problems. Replace the door seal if it's damaged or torn.

For manuals, repair guides, and specific part recommendations, enter your model number.

Replace the freezer defrost bi-metal

Defrost sensor

The freezer defrost sensor—also known as the defrost bi-metal or defrost termination thermostat—is next to the evaporator. It trips when the evaporator temperature gets too high, to protect the evaporator from overheating. When it trips, the defrost bi-metal shuts off the defrost heater. A defective defrost bi-metal prevents the defrost heater from working, causing frost to build up on the evaporator, causing a warmer freezer interior. Replace the defrost sensor if it prevents the defrost heater from working.

For manuals, repair guides, and specific part recommendations, enter your model number.

Replace the freezer defrost heating element

Defrost heater

The defrost heating element melts frost from the evaporator fins to improve cooling. If the defrost heating element fails, excessive frost covers the evaporator fins. Replace the defrost heating element if it’s damaged or not heating.

For manuals, repair guides, and specific part recommendations, enter your model number.

Replace the freezer electronic control board

Electronic control board

The electronic control board—also called the main control board or the power control board (PCB)—manages the compressor and the defrost cycle. The control board activates the compressor to keep the freezer cold and runs the fans. The electronic control board monitors temperature sensors to control freezer temperature and the defrost cycle. Replace the electronic control board if it’s not working properly.

For manuals, repair guides, and specific part recommendations, enter your model number.

Replace the freezer defrost timer

Defrost timer

The defrost timer controls the intervals between defrost cycles and limits the length of the cycle. During the defrost session, the timer activates the defrost heating element and prevents the compressor from running, so frost melts from the evaporator fins. Replace the defrost timer if it doesn’t control the defrost heater and compressor properly.

For manuals, repair guides, and specific part recommendations, enter your model number.