Bill I had one that would do that if there was ever a power blink. Like if the power ever kinda blinks, but doesn't actually go out. We would come home from work and the stupid door would be up. It did it in the middle of the night a couple of times also. I contacted my door guy, and he told me that he'd seen this happen before, but couldn't tell me why. I put up with this for a year or so and replaced the thing, and it has never happened again.
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