Is the moisture on top of the freezer door gasket?
If there is moisture on top of the freezer door gasket or water droplets on the door gasket, this can be caused by water dripping off the mullion or center rail. Certain refrigerators are equipped with a separate control to prevent exterior moisture from forming on this seal. The Energy Saver or Humidity feature controls a heater that helps to reduce moisture on the vertical hinged seal. Turning this feature On/Off will vary by model, so please reference your Owner's Manual for specific instructions.
CLICK HERE for additional information on this feature
Are the doors left open for long periods of time?
Are the doors opened frequently?
Frequent door openings can let in humid room air. Keeping door openings to a minimum will help, but may not completely eliminate frost or ice in the freezer. During months of high humidity (especially if a home is not air-conditioned), it is normal to see some frost and sweating on the interior walls or on food packages.
Are the doors sealing correctly?
An improper seal of the gaskets on the refrigerator or freezer doors could also cause humidity to form. Check the seal around the outside doors and the freezer door to make sure nothing is obstructing the gasket seal.
Are the air vents blocked?
Blocked vents can cause a couple of different issues including moisture build-up or excessive frost. In order to help the moisture build-up you need to allow room for proper air flow between the freezer and refrigerator compartments. Cool air enters and exits the refrigerator compartment from the freezer compartment through vents. Depending on your model, these vents are in different locations.
CLICK HERE for more information on ensuring proper air circulation.