Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener
Once again my wife left this morning and the garage door would not close. It's a Liftmaster 1/2 HP Security Plus chain driven opener. The motor hums but nothing happens. The chain doesn't move or the stocket on top of the motor doesn't move either. Any suggestions?
You should check the gears inside the box, After years , the gears get dry and die, you can by online or from Sears the kit and replace the old gears. I just changed mine...not too difficult :) .
Posted on Mar 26, 2009
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Posted on Jan 02, 2017
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