- Mar 7, 2013
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My guess would be the battery. You have no way of knowing how long a battery has been on the shelf. I bought my first battery (high dollar one at that) from radio shack and it worked one time. Got the cheap walmart one and it is still going strong. It is going to take a little more power for it to raise as opposed to lowering the door so it only makes sense that it would be a little more sluggish on the raising of the door.