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

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Keylees entry and remote controls do not work at the same time

I replaced the batteries in my remotes for a Craftsman 1/2 HP garage door opener # 139.53664ART2. In trying to reprogram the remotes I erased all the codes and the remotes and keyless entry both did not work. I tried reprogramming and can program the remotes(I have 2) or the keyless entry. I can get either one to work by themselves but I can not get both to work at the same time. I have a 2 car garage, each with the same opener and keyless entry pad.
In trying to follow the directions in the manual, it says the the STR lite should blink when pressed and released. My light stays on steady when it is pudshed and released. I have a premium control console but I can not program either the remotes or keyless entry when I follw the directions to program if you have a premiun Control Panel.

thanks,

Bob Wascher

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  • jlyke Nov 16, 2008

    I have the exact same problem. It's a Chamberlain Security+. Either the keyless entry or the remote will work, not both. I have gotten each of them programmed to work individually, but once one is learned, the opener will not learn the other.

  • Anonymous Dec 25, 2008

    I, too, have the same problem.  Once I get the garage to learn the remotes, it forgets the keyless entry code.  And once I get the garage to learn the keyless entry code, it then forgets the remotes. . .

  • Bobby1963 Jan 03, 2009

    I've the same issue with the Craftsman 139.53675SRT2 GDO. I can get either the two car remotes or the keyless digital pad to work but not both at the same time.

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There are two types of technology with this operator (rolling code and non-rolling code). This operator will except one or the other but not both. It is not uncommon for a rolling code (Security+) remote or keyless to lose the "rolling"part of its technology and become a non-rolling code device so it is not compatable with the rolling code technology. You will need to replace the one remote or keyless that is not like the others.

Posted on Jan 03, 2009

  • Door dude Aug 31, 2010

    Found this to be 100% accurte. I have two doors, each with a keyless pad and a remote. As a side note, you must clear all codes and program the keyless pad first, then the remote. However, in my case one of my remotes went "non-rolling" at some point, where if the keyless was programmed first (it must be) the remote would then not be recognized. The 'bad' remote would still work if the keyless pad was not programmed.

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