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I have a 41a5021-18 chamberlain security+ 1/2 hp garage opener that requires constant pressure on the down position of the wall switch in order to close. If I release the switch the door reverses direction and completely opens.


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Hello ccap..... It sounds like one of those sensors has gotten out of alignment with the other. check to see if there is a steady green light on each sensor. If not, adjust until the light is a steady green. Joe\015\012\015\012Thanks ... Vacuums
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