Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener

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Chamberlain garage door opener won't close

I just bought a house with a chamberlain whisper drive garage door opener. It was working fine until the emergency release was pulled while the door was in the open position. Now the door will open without a problem but the door seperates from the drive track when closing. The door stays in a semi open position while the drive track continues on the path. If we manually lower the door, the door will reconnect with the drive track to open properly (the emergency release is returned to the closed position.) Does this sound like something I should get a professional to look at?

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Read manual, if you have, on trolley engagement

Posted on Jan 17, 2009

  • marty metzger Jan 17, 2009

    read up on trolley operation


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One sensor should always be yellow, the other should be SOLID green.
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Check to make sure the are aimed properly at each other.
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