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

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Problem with my Craftsman 139.53879

Hi I owen a Craftsman 139.53879 garage opener, How do I know when I need to change the batteries on my controls , I tried programing them and they don't work. only the wall button. Please help. Thank you in advance.

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When you have to be closer to garage to make remote work tells you battery is going low. Do you have a LOCK or VACATION button. Make sure it is off. May need to recode remotes. See manual for how. Very easy

Posted on Jan 15, 2009

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SOURCE: how to change the code

The model number you give is for a remote unit. You cannot change the code on this. What are you trying to do? There may be other possibilities.

Posted on Sep 03, 2011

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SOUNDS LIKE SOMEONE MAY HAVE PRESSED THE LOCK / VACATIONS SWITCH ON YOUR WALL CONTROL. IF STILL NOT WORKING AND THE LED IN THE WALL SWITCH IS NOT FLASHING TRY AGAIN TO PROGRAM YOUR REMOTES.

GOOD LUCK

STEVE

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Where is the back up battery located on garage opener?


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I have a crafsman opener #139,53879. Installed an outside remote on door and now the factor opener will not work.


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My liftmaster garage door opener does not work. I did not change the battery yet. Then what do I do?


If the battery is bad all you need to do is replace it. "Does not work" covers a lot of territory. What does it do? Anything at all? Work with the wall control or keypad?

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Keypad garage door opener will not operate


what keypad are you using with new opener? Frequency has changed. can't use old one. you probably never needed to change things; just needed to follow proper coding procedures.

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