Mine will do that randomly. I attribute it to a good seal. In theory, if a slug of warm air gets in the freezer (door left open too long), as it cools it will contract and develop a slightly lower air pressure inside the unit compared to that of the outside air. This'll put positive pressure on the door keeping it closed. That's my story and I'm stickin' to it.
Keith
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No More Class A. Now a Tagalong.
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