My Sub Zero refrigerator door is unusually hard to open, I realize that there is a vacume seal on these doors but it has recently become extremelly difficult to open.
If you open the door and then close it then open it again is difficult normal this happens espeacilly in big volume refrigerators and freezers.You should wait for sometime to open it again as it needs some time to balance the pressure.Warm air goes inside and cools down so the pressure is decreasing.If there is a pressure balance valve installed at the door check it if it funcitons.
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