I'M GETTING ICE FORMING ON THE INSIDE OF MY DOOR AT THE TOP. THE GASKET LOOKS LIKE IT IS SEALED, BUT MAYBE NOT TIGHT ENOUGH. DO I NEED A NEW GASKET OR IS THERE A WAY TO FIX THE GASKET SEAL? THE FREEZER IS AN UPRIGHT MODEL NO. MFU20F3GW7.

Hello;

My name is Peter. I am a retired field service refrigeration technician.

1.) Due you have the freezer in your garage? Freezers and refrigerators are not designed for the drastic temperature change through the seasons. If you had a service contract, your contract would be canceled.

2.) If you can run a piece of paper between the top door gasket and the freezer body you do not have a tight seal. Repair - Recondition the gasket. Wet the door gasket with water, with a hairy dryer heat the gasket while genteelly pulling the gasket out to expand with a spatula.

3.) If the gasket is good, then you are getting moisture either thru the top front of the unit or the top of the door.
a.) Inspect the liner where the ice build-up is. Are there cracks? Repair - Seal cracks with a good silicone adhesive.
b.) Inspect the upper door section and the front top of the freezer for possible leaks in the joints. Here again seal with adhesive.
c.) If the top of the door is expanded, then you have moisture in the door and need to replace the door. You will never get the moisture out of the insulating material.

Ice forming us typically caused by an air leak. There is moisture in the air around us and when it sneaks into a freezing cold environment, that moisture turns into tiny ice crystals and sticks near where it leaked in. The first thing to check is the door gasket. The easy way is to try to slide a business card where the gasket sticks to the door while the door is closed. If you can get the card in the gap, then air can get through there. You can try to repair the door gasket or buy a new one. It is also possible it is leaking through where the water line comes in. Check to make sure the openings are sealed. You can use something like Permagum to fill in any holes. The last thing I could think of is a water line leaking on you ice maker. That would likely be a solid ice chunk where an air leak looks more like hard snow. If that is the case you'll have to pull it apart and find where it is leaking.

Hi,

Is the unit level to the ground or platform it sits on? The reason I ask is that many cases after closing the door a vacuum occurs, after this vacuum settles the door can allow gap in which will cause this issue. So with out opening the door or 10 mins after, check the door seal to assure a good seal. Some door can be modified to seal by heat (blow dryer or steam). BUT, inspect unit before assuming this is the issue! I can further assist you in how to apply heat to reform gasket on door or even reshaping door to seal better if needed.
Get back to me on model you have and the results of your findings about this seal issue.
Basically, you have an air leak and this is the cause of a seal issue. Results in a condensing warm air mixing with cold air and causes ice cycle to form. Usually around the top because heat rises and cold air drops. With this information you can adjust the door to meet the cabinet and seal you years to come.

Good luck and feel free to send me information if needed.

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

Freezer burn to food is caused by air & moisture in contact with it.
There should be a tight seal by the rubber gasket along all the inside edges of the freezer door. This gasket prevents unwanted hot moisture and hot air from entering the freezer compartment and causing ice build up. You can test the integrity of the rubber gasket seal by seeing how the freezer door will pinch a slip of paper in various spots around the freezer door. If the slip of paper pulls out easily, there is not a good seal at that spot. If that's the case (which I believe it is), the door gasket needs to be replaced. By the way, ice will build up over time because you need to access the food in the freezer, hence you will introduce moist air each time you open the freezer door.

frost forming is caused by excess room air getting into the freezer because of leaky door gasket which should seal snugly on a dollar bill inserted between the gasket. Frequent or prolonged door opening will also allow room air in. The ice chute door may not be closing tightly. The higher moisture content in the air freezes on the surfaces of the food etc.

Whoever sold you the refrigerator or replaced the door and seal should be obligated to make it right.

If we have ice on the inside of the freezer it means air is being pulled into the box somewhere. The most likely place is the door seal, it sounds like you already checked it, but I would suggest that you look very close at the bottom and aides of the seal too, it could be leaking in air from there. Check the inside liner for cracks and seal them if you find any. Look at the corners of the cabinet to make sure there is not room for air to come in.

Air leaks will lead to frost, it is just hard sometimes to find where it is leaking in.

you might need new door seal :
Refrigerator gasket Number: 67003548 70$ and see if it EZ to replace...good luck

try using a hair dryer on the door seal to get it to take proper shape. I was a service tech for years, and this worked every time.

i wouldn't worry about vacuum seal. door gaskets contain a low powered magnet around the entire face for "contact" seal, id look into perhaps something placed on one of the shelves or door blocking the door from closing as tightly as you remembered. if you have a problem with that gasket. it would have to be physically ripped and where it didn't make contact you would have an influx of warm air resulting in ice balls forming inside door liner adjacent to seal