Why does a fridge or freezer door get suctioned tight just after you close it?
by 
IwillQuitAtLevel50
ANSWERS: 4
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No, it's a piece of poop fridge.
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there is a magnetic strip in the door.
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When you open the freezer door, a flood of heavy, cold, dry air flows out the bottom of the opening. This pulls lighter, warm, moist air into the freezer compartment. When you quickly close the door, the moisture in the warm air is cooled instantly and condenses out. This causes the 'new' air to lose volume creating the vacuum effect. As the air equalizes through an inflow of air through various small leaks in the compartment, the pressure returns to normal and the door opens normally. This effect happens to all refrigerators, even large professional walk-in coolers. If it doesn't happen to your fridge, it means it has an air leakage problem and is likely costing you more money to run than a well-sealed refrigerator.
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I am a refrigeration technician. The white strip is simply a rubber gasket to prevent air leakage in or out. Some home freezers do have magnets in them, but not all freezers do. But all do get the "suction affect". The suction is created when the warm air outside the freezer enters the the freezer. After you close the door the warm air contracts as is cools, thus creating a vacuum in the freezer. The problem with the magnet theory is that if the magnet were creating this force, the door would always be under that force and be difficult to open every time you open it. The magnets aren't powerful enough to create the force that the vacuum can create, i've seen freezers that were nearly impossible to open immidiatly after closing. You can test if yours has a magnet in it by placing a magnet next to it (magnetic side facing the part that seals the case). When you put to magnets together there magnetic fields repel each other, so if you can feel the resistance, you have a magnet in there, if there is no resistance, you probably don't. The magnet will try to stick to the door when doing this so don't let that fool you.
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