garage door

OK here's what it does.
it goes all the way down, sits there for a second then opens again. It's a "Liftmaster" 1/2 HP motor. Checked the sensors and they seem to be clear and operational. Any ideas? Thanks much
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Should be an adjustment for the 'down limit' on it somewhere, try easing it. I had that problem, traced to slight swell in the ground lifting the slab a bit. Mine, though, did not have a perceptible pause before it reversed.
Harry K
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yeah i've got it all the way cranked up...will try...thanks.
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Lube it .. .. mine does that in cold weather when the rail needs to be lubed.
wf3h wrote:

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same symptom! does it when the weather gets cold...
will try...thanks
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sounds like you need to reset the lower limit.
s

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Is it properly balanced? Maybe the spring is trying to open it up when the opener is making the door go down.
Disconnect teh door from the opener and pull it down to the halfway point. Let go. If it stays there, it's properly balanced; if not, call the garage door guys.
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