Open the door for the refrigerator side.
Move any food items that are up against the center wall. This is the wall that is shared by the freezer and refrigerator.
Feel along the top of the wall for the top vent between the two sides. It should be parallel to the ice maker. This vent pulls air into the refrigerator from the freezer.
Bend down to inspect the lower area of the wall to find the lower vent. In some refrigerators, it is located on the wall above the two crisper drawers. In other units, it is located on the wall by the lowest crisper drawer. This vent moves air from the refrigerator into the freezer.