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

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Chamberlain Garage Door Opener will not close door

I have a Chamberlain 1/2 HP Garage Door Opener and when I push the button on the remote or wall it just starts clicking and won't close. This problem has gotten worse and when it first started the door would go almost all the way down and then come back up. It seemed to always open ok too.
I have tried adjusting the "Close Force" button and the sensors seem to be aligned correctly. I have also greased up the rollers.
Anybody have any idea what could be wrong here? Thanks to all who reply......

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  • hgilgen Feb 09, 2009

    Thank you for the reply. I believe both of the sensors are working properly. One has a green light on it and the other an amber light. I was messing around with it again yesterday and when I disengage from the door it will sometimes go all the way through the motion without stopping, but sometimes not.

  • hgilgen Feb 12, 2009

    I think I may have this fixed now. I messed around with the eyes for about 30 minutes and think I may have finally gotten them lined up right. I don't know how they got so out of whack?!? I had to slightly bend the bracket back and then the green light got really solid. I didn't think it had to be that solid. Before the little green light was flickering a bit.

    Thanks a lot for your responses guys. You may have saved me a few hundred bucks!!! I was ready to buy a new opener this weekend.

  • bdevolder Feb 18, 2009

    The sensors are lined up (both solid LED's). The orange LED on the back of the machine flashes 4 times when I try to close the door. A previous post set to check the manual, but we just bought this house without the manual for this (the machine looks very new).
    Hope somebody can help.



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It is most likly your sensors You should not have to mess with your force settings but I can help you with your sensors assume you have checked to make sure there both looking at each other. First close the door so you can see them better. Tap each one of the sensors to see if any of the lights are flickering. if your then you need to tight them up and try again. Also when its dusk or night close your garage door and look at the lights see if one of the tracks is shaking sensor. If not check the wires make sure there is not staple or cuts in them. Then last thing you can check see if your door is hitting the back of the sensor mount it does happen. Also remove and ropes or handles you have fromt eh buttom of the door. That should take care of the problem. Make another post if your still having problems

Posted on Feb 10, 2009

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The problem is with the safety eyes. Make sure that both eyes are lit. If not, align them making sure that they are pointing directly at each other. Also, if you adjusted the force setting make sure that it is not turned up past 5 or it can be dangerous.

Posted on Feb 09, 2009

  • Vince Heuser Feb 09, 2009

    The next thing to try is take off the cover and see if the gear is stripped. If it is the bottom will be full of white shavings



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