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Old 11-15-2007, 11:55 AM   #1
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Garage Door Opener up? or Down?

Can anyone explain to me how a typical modern garage door opener "knows" when it needs to open the door or close it? Do different manufacturers use different methods? Is it the mechanical position of something within the housing or an electronic flag on some circuit board? Is there any way to force it into opening a door on consecutive remote-clicks instead of alternate open-close-open-etc... cycles? (or vice-versa, consecutive closings?)


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Old 11-16-2007, 09:59 AM   #2
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Originally Posted by kelly_b View Post
Ummm what a weird, yet interesting topic.
ya it is, but I subscribed the second I saw it posted, I dunno the first thing about openers and mine makes noise but doesn't move my garage door, figured I'd tag along lol


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Old 11-16-2007, 11:30 AM   #3
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How can you reverse the position?.... I think it is in fact hard coded, and the chain must be in certain position when setting up... I don't think you can fool the opener once it is setup... i.e. change close to open or vice versa....
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Old 11-18-2007, 09:17 AM   #4
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Indeed an interesting topic. From my experience, when garage door openers have failed, it's because they suddenly stop partway through a movement, reverse direction, then begin the original movement again only to stop, reverse, etc, until the door gets lower and lower towards the closed position. So, not being a garage door opener maven or guru, I'd have to say that it's either an electronic shortcoming on the opener's circuit board or a combination of the limiters/threshhold sensors and the circuit board being defective. Well, at least it sounds plausible - right?
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