When closing one of the doors in a French Door Refrigerator, the change in air pressure can cause the other door to slightly open due to the vacuum effect. To prevent this, close one door gently or ensure the both doors are tightly closed.
The closed door on a French door refrigerator will pop open or might rattle the moment the other door gets closed due to inside air pressure increasing. As the opened door is being pushed closed it drags in and traps an excess of air inside the refrigerator looking to immediately escape. The pressure exerted on the one door by holding the handle to shut it close forces the trapped excess air to push open the other door in order to escape. That is a perfectly normal according to the laws of physics.
A closed door rattling or popping open very momentarily is a normal phenomenon and not due any defect of the product.
Door can rattle if adherence of the rubber gasket is low. In that case, clean the rubber gasket. However, if it’s just the case of door popping open for a brief moment to let out excess of air dragged in from closing the other door, it’s perfectly normal and nothing can be done to prevent this.
One solution to minimize the impact would be to level the product so that it inclines slightly to the back allowing gravity to ensure doors always close completely.
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