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

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Change keyless entry passcode for chamberlain model 4100 door opener

I just bought a house with a chamberlain model 4100 door opener. I do not have the user manual. How do I change the passcode on the keyless entry?
Thanks!

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  • hookera Jan 05, 2009

    I need to change mine too

  • cortmartin Feb 09, 2009

    We have the same problem, if anyone finds out let us know.

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  • 18 Answers

You have to press a Yellow/Purple button on the back of the garage door opener unit.
It is the LEARN button. Then enter a new four digit code into the keypad and press the enter button.
The unit should click and the lights should flash. This acknowledges it has learned the new code.

Posted on Mar 10, 2009

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Try: Click on Sears (below FIXYA) on this website, type in your model No & search. You will get a shortlist; click on your model,below the page u will get Manual/Guides. Click on the blue, you have your manual on line.
And dont forget to rate me on this great site.

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