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

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Whisper Drive not working

As of today my Whgisper Drive unit will not complete an open or shut cycle. It starts when the remote, or keypad is used, then after 2 seconds it stops and the lights on the unit flash for 4-5 seconds. The lights stay on.

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  • harvey_shear Jan 15, 2009

    Problem was fixed. The safety beam at the bottom of the door was out of alignment and the door would not close. As soon as I realigned the beam, PRESTO, the door worked perfectly.



    Harvey Shear

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  • 244 Answers

Why not call Liftmaster on 800 number. I can see a problem going down with safety beams, but not up.

Posted on Jan 14, 2009

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Posted on Jan 02, 2017

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