Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Door goes up and down but light does not work

I have a 1/2 horse chamberlain opener and the door goes up and down using the remote openers and the mounted button. The problem is that the light does not come on when raising the door or breaking the sensor beam. The bulb is a standard 60 watt bulb and it works. This happend when the bulb blew. Also I can program 2 remote openers to work using the set button on the opener but I can not get a third remote opener to work and when I try it deactivates the other 2 openers.

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  • Anonymous Feb 28, 2009

    Light does not come on when door goes up or down, however if i manually operate the contacts that light the bulb it comes on. So, what so I need to change that causes the contacts to operate? sears model 139.65000

  • mtmikeandpat Mar 02, 2009

    I did not see a solution for the problem

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1 Answer

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UNPLUG THE UNIT AND WAIT 5 MINUTES.
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IF THIS DOESN'T SOLVE IT GOTO CHAMBERLAIN.COM AND DOWNLOAD THE MANUAL (FREE PDF FILE) IT WILL TAKE YOU THROUGH A COMPLETE DIAGNOSTIC.

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It sounds like for some reason the receiver has lost the stored codes for your remote transmitters. The wired button goes right to the opener so it continues to work.

On the back of the opener you'll see a small pushbutton. Press it and the indicator light nearby will come on. While this light is on, press the button on your remote. The light will go out and the code is stored. Repeat this for each remote. The process is the same for the keypad, except that you need to enter your desired 4-digit code.

If this programming doesn't work you'll need to replace the receiver board. Like any other piece of computerized equipment, it can fail or be damaged by power line problems. But try reprogramming first, as that's the most likely solution.

If this has helped you, please take a moment to rate the solution. Thanks for asking here!

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