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

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New code entry does NOT override old code on Craftsman 315 keypad

Being the neighbor kids have become aware of my garage code, I went to reprogam it to a new code only to find now the garage door opener responds to both the old code AND the new code. Must I reset the garage door opener itself and then re-learn each of the remotes and a new code on the wireless keypad?

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Yes. Press the learn button for 8 seconds to clear the remote memory. Reprogram all remotes and keypad

Posted on Feb 26, 2009

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1 Answer

Keyless entry reprogram at new house. Don't have


On the rear of the motor unit near where all those white wires go you will find the smart/learn button. Press and immediately release this and then walk over to your keypad and key in any 4 digit code you like and press enter.

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Replacing 315 with 390 OR 390 with 315? I had same problem which went away on its own. Did you buy any new electrical or electronic products just before problem started? I had this with a customer who had electrical interference from within house or a neighbor's satelite dish. You can try turning off breakers one at a time to isolate circuit causing problem .

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1 Answer

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buy new remotes. New opener is 315 mhz, old are 390 and not compatible,

Jan 11, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Reprogram a keyless entry remote control for a liftmaster


MOST OF THE WIRELESS KEYPADS YOU DON'T NEED THE OLD CODE TO PROGRAM A NEW ONE.
JUST PRESS THE LEARN/PROGRAM BUTTON AND RELEASE YOU NOW HAVE 20 SECONDS FOR HER TO PUNCH IN THE CODE SHE WANTS AND PRESS AND HOLD ENTER. THE NEXT TIME SHE PRESSES THE BUTTON THE DOOR SHOULD WORK.

NOTE IT WILL WORK FOR ABOUT 20 SECONDS AFTER ENTER IS PRESSED THE FIRST TIME. AFTER THAT YOU NEED TO RE-ENTER THE CODE AND PRESS ENTER.
PROBLEM SOLVED HAPPY NEIGHBOR!!

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1 Answer

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Hold down learn button for 8 seconds. This clears the memory for all remotes. Then reprogam your remotes

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