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

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Chamberlain door opener--Door opens but light will not come on

I have a Chamberlain Heavy Duty Garage door opener. Recently we lost power to our home for a couple of days. The door functioned perfectly until after the power came back. The door opens and closes well. The problem is that the light will not turn on. I've manually tried turning the light on and can hear a click when I press the light button. I've changed both light bulbs with new ones. I was looking for a reset button, but could not find one. The motion detector appears to function, too, but the light still does not come on. Any advice you can offer will be greatly appreciated! Thanks.

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  • Anonymous Jan 04, 2009

    Did you ever find out how to fix this, I am having the exact same problem.

  • arforceone Jan 07, 2009

    Thanks Door Tech.
    found out that the real problem was not the contacts or logic board but incompatible bulbs. My wife wants to use those curly CFC bulbs everwhere we can...didn't work in the door opener for whatever reason...we replaced them with traditional bulbs and we have no problems with the opener now (bet Tommy Edison is smilin' from up above)...thanks for your time and hope this can help someone else down the road

  • Valerie Sainz Oct 05, 2013

    Thank you for posting this! I had the same problem. Changed the light bulbs and "ta da"! lights came on. Thanks



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We had he same issue and changed our bulb from a CFC back to a traditional bulb and the problem was solved!

Posted on May 13, 2010

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If you are getting a click the relay on the board sounds like it is working. Sometimes the contacts in the light socket gets burn spots on them. Try unplugging the unit, unscrewing the bulb and with a small scrapping tool (small flat screwdriver) scrap the bottom contact and the contact on the threads. Bend the contact on the threads a little too make better contact with the bulb. Screw the bulb the bulb in completely.  If this does not solve your problem the only the left to do is to replace the logic board.

Posted on Jan 07, 2009

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  • dvanwye Sep 13, 2011

    I too Changed from CFC to regular bulbs...the lights work fine now!!

  • Rymacs Jan 21, 2012

    My contacts needed to be pulled out. I'd think that changing bulbs would help since the shaft on traditional bulbs is longer and wouldn't mater if the contacts were pressed to the bottom of the socket but since they quit making them your going to have to get your self a needle nose pliers and pull them out a little. I like the energy savings and the old ones didn't his up from the slight vibration... I didn't cut the power cuz I didn't want to reprogram the remotes but if you touch the contacts together with power there you might fry something including your self thanks for the tip door tech

  • Mani
    Mani Apr 27, 2014

    thanks, pulled the contact at the base with a flat screw driver and it works!


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There is an inherent design flaw in the sockets with some of the openers. The Whisper Drives have this problem. The bulb does not make a good contact with the bottom tab. Sometimes, you can bend that tab up to a 45 degree angle and then try reinserting the bulb. If you notice excessive pitting on this contact, then it needs to be replaced. Be sure to disconnect all power before doing any work on your opener. Verify power has been disconnected with a meter or test lead before beginning your work. Use caution with CFL's. They can be wider at the part nearest the male portion and rub on the housing of the opener. This will cause the bulb to torque away from the housing and hence, loosing your connection with the tab at the side of the female socket. This will also cause for a lose of connection. Good Luck.

Posted on Jun 06, 2015

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