Were the doors left open for long periods?
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 eliminate frost or ice in the freezer. During months of high humidity (especially if a home is not air-conditioned), it is reasonable to see some frost and sweating on the interior walls or 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.
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Are the air vents blocked?
Blocked vents can cause a couple of different issues, including moisture build-up or excessive frost. To help the moisture build-up, you need to allow room for proper air flow between the freezer and refrigerator compartments. Cold air enters and exits the refrigerator compartment from the freezer compartment through vents. Depending on your model, these vents are in different locations.
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Is the refrigerator level?
It is important to ensure the refrigerator is level. A properly leveled refrigerator will help with the overall proper operation of the refrigerator. Check to make sure the floor under the refrigerator is level. If the floor is not level shims may need to be used to properly level the refrigerator. Please refer to your Owner's Manual or Installation Instructions for specific leveling information for your refrigerator.