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

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Beeping light coming from unit

My garage door opener keeps beeping. there is a red light that is on by the bulb but I dont know how to turn it off..

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Unplug the unit for two mins. and plug it back in. That should stop the blinking & beeping, but blinking & beeping mean a problem. What kind of operator do you have? Maybe I can help you troubleshoot the problem.

Posted on Jan 04, 2009

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Chamberlain whisper drive bulbs keeps burning out


I had a similar problem on my Liftmaster units made by Chamberlin. I would leave the garage door open for hours during the day so our dog and children can enter the house through our garage and laundry room. Everytime they come into the garage the Light's would go on because of the safety sensors are "tripped" at the bottom of the garage door tracks.
I turned off this feature and my lights are lasting much longer now. Over 1year in fact. To turn off and on this feature, make sure the opener light is off, then Press and Hold the Light Switch on the Wall Control Until for about 10 seconds till the light goes off. This deactivates this sensor from turning the lights on, but does NOT deactivate the sensor for Stopping the door if something is under it. Safety is still preserved.
Additionally, my door opener would vibrate while operating, and need to be aligned - I did this and also prevented the bulbs from "shaking". As we know the light bulb filaments are brittle especially after some use - this I think also helped lengthen the life of my lights on the opener.

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One light is amber the other green....when threshold is crossed light will not turn on automatically


To have your lights come on automatically when you walk into an open garage, you must START with the lights ON. If you don't want that feature and you want to turn it off, you must START with the lights OFF.



To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash. Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.



To disable this feature, start with the light bulbs OFF and everything else is the same.


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Random blinking of the learn light is normal.

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To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash. Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.

To disable this feature, start with the light bulbs OFF and everything else is the same.


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On security + models, the lights should come on when someone walks through the open door. According to the owners manual, this feature can be turned off, but I can't get it to work at all. Can anything...


To have your lights come on automatically when you walk into an open garage, you must START with the lights ON. If you don't want that feature and you want to turn it off, you must START with the lights OFF.



To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash. Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.



To disable this feature, start with the light bulbs OFF and everything else is the same.

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1 Answer

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That little green bulb just flickers when the logic board is receiving a radio signal and is also used to send a code to assist with diagnosis. It does not keep the opener from working. You say the door is 'stuck'. If it is stuck in the open position the trolley may be jammed against the bolt just in front of the motor unit. If so, loosen the chain to relieve the pressure and the opener should run. When the door is closed locate the 'up limit' on the side of the motor unit and turn this 2 complete turns in the opposite direction of the arrow printed on the cover. Then tighten the chain.

Mar 05, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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To have your lights come on automatically when you walk into an open garage, you must START with the lights ON. If you don't want that feature and you want to turn it off, you must START with the lights OFF.


To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash. Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.


To disable this feature, start with the light bulbs OFF and everything else is the same.

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To have your lights come on automatically when you walk into an open garage you must START with the lights ON. To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash.

Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.

To disable this feature, start with the light bulbs OFF and everything else is the same.

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This is a logic board issue. You can purchase a replacement one at searspartsdirect.com. Enter in your model number and a parts list will come up. This is a fairly easy install, make sure and unplug the unit first. You will have to reprogram the remotes. Thanks BB

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