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

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I have a craftsman 1/2hp opener part # 41a5021-2g 2002 model year. The remotes worked fine all the time and all of a sudden 2 days ago they quit working. I changed batteries but no luck. Any help would be appreciated. This was a sudden unexplainable change.

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Someone hit vacation or lock on wall control?

Posted on Jan 15, 2009

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I have an older Craftsman GDO setup. 2-3 button remotes,a manual hardwired push button operator and my wifes' car has been successfully liked to operate the opener as well. Up untill just a couple of days...


I suggest you look for a Chamberlain dealer in the yellow pages and explain what you have. You are looking for a 'universal receiver' that will work with what you have.

Mar 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

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I have a 1/2 hp craftsman opener, it has the premium wall console, keyless entry and two remotes, chain driven. I installed it about a year and a half ago, it's worked fine since. Just recently, it would...


I would pull the logic board and check for loose or missing connections/traces on the printed circuit board. You can also foll the 110v line and make sure it has not worked loose.

Nov 09, 2009 | Sears Craftsman LiftMaster Chamberlain...

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Remotes quit working on Craftsman 53975 garage


It sounds like you have a logic board problem. If your remotes work at all it is not a programming problem. You could pull the logic board and check for loose connections especially around the small transformer. 18 years for an opener is very lucky. Their average life is about 1/2 that.

Oct 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

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Remotes won't work


Sounds like a frequency issue. A remote work like the radio in your where each station is on a different frequency. Some signal is interfering with you frequency (390Mhz) You could try another brand external receiver with new remotes or with that old of an operator you might just think about replacing the operator (don't go with "Wayne Dalton")

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Have you tried to re-learn the remote? The instructions should be inside the opener cover.

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