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

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My garage door Chamberlain1/2 HP

The chain does not pull the door up nor down. The motor makes whine sound. When it's attached to rail.

MK

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  • Anonymous Feb 02, 2009

    the door open half and clost ,clost half and open.

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  • 112 Answers

You have a stripped gear inside the opener. When you take the cover off it will be full of small white flakes. Replace the entire gear and sprocket assembly

Posted on Jan 30, 2009

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1 Answer

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