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

2 Answers

Chamberlain Whisper garage door system that only closes 3/4...

Then pops back open. Nothing blocking sensors, though one sensor has either a green or yellow light at various times. Does this mean sensor has gone bad?

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  • David Shaub May 11, 2010

    It depends on the type of sensor. Of you have a contact sensor, it needs replaced. If you have a photoeye, it needs to be adjusted. Some have a learn function on them.

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  • 18 Answers

One sensor should always be yellow, the other should be SOLID green.
If the lights are not consistently SOLID, you have a sensor issue.
TEST: If the door closes completely by pressing and holding down the wall pad button, you have a sensor problem.

Check to make sure the are aimed properly at each other.
Check the wire at the sensor and more importantly at the machine (If the wires are loose at the machine (terminals) it can cause this problem. Remember the machine does shake a lot.
If the wires are good, the sensors are aimed correctly, you have a sensor issue and need to loacte a replacement set.

Posted on Feb 20, 2009

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Sensor setting was all the correction for me. I had to play with the sensor angle until i got a good signal (neither sensor blinking after opening or closing). After that was set, the problem seemed to be fixed!

Posted on Feb 24, 2009

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The garage door will go down to the floor and then stop and come back up on its own. also at times will only go down to remain open 3-4 inches


Sounds like you need to recalibrate the stop point. If its coming back up the sensors may be off alingment (make sure the lights green/amber are solid and not flickering) or the door may sense an object that isn there and reverse. You can google Chamberlain powerdrive door opener manual and dwnload it for programing instructions.

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1 Answer

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This is cause when there is something blocking one of the sensors. Look on each side of your garage door near the concrete when the door is closed and you will see small sensors that are facing each other.. Make sure they are not misaligned and that nothing is in front of them.

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My Chamberlian Whisper Drive 1/2 Hp opener has an issue. My motion sensor back light blinks and the factory supplied remote does not work now. Help.


You wall control is in lock mode sounds like press and hold the lock button for 3 to 4 seconds that should take care of that problem.

Alleejr your problem is not the same and ill need little more info. Where is the red light on your wall control? If its on the way up its not your sensors at all. Is your spring broke?

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1 Answer

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The colour on the sensors doesn't change.
One is orange constantly and the other is green when detecting a signal from the orange sensor.
If the green is flickering, they are not adjusted correctly.Move the green sensor until you get a good solid green. Holding the wall pad button down, just bypasses the sensors.

Try adjusting only the sensors so that they are solid.

In addition, check the little yellow light on the back of the machine and count the flashes.
The number of flashes will tell you what the error is in your manual.

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read manual, if you have, on trolley engagement

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If you have to hold down the button to close the door, you are bypassing the sensors ...
Check the alignment of the sensors. Should see a solid GREEN light

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