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

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I have a Lift-Master Model 1245 opener with 41a4252-7c logic board. The remote wont work until the light turns off. After the 4.5 minute cycle , the remote works until the light is back on. I have reset the remote and it still happens. Suggestions?

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This is a very unusual problem you have. The only thing I can think of is trying a different light bulb or try unplugging the opener and removing the light bulb. Pull out slightly on the center contact of the socket. I am thinking some arcing is causing this problem.

Posted on Sep 30, 2010

  • 1 more comment 
  • holaplaneta Mar 03, 2011

    I have exactly the same problem. I got a new remote and it did the same thing. Door will open with remote and only until the light turns off, it will work again.
    Door switch works as usual though.

  • Don Maggard Mar 03, 2011

    Have you tried removing the bulb? I'm thinking either the bulb or the socket is causing interference with the radio signal. Crazy as that is, nothing else makes sense.

  • KurtisDaHulk Jun 06, 2011

    Did you ever figure this out. I am having the same problem.

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1 Answer

My lift master 1/2 hp wont work I get a pop noise when i push the wall opener but nothing more I was told it may be the logic board, is it easy to change logic board?


I WOULD GOTO LIFTMASTER.COM AND DOWNLOAD THE MANUAL - GO THROUGH THE TROUBLESHOOTING SECTION TO BE SURE THAT YOU NEED A CIRCUIT BOARD.

YES IT IS A GOOD DIY PROJECT BUT ONLY AFTER YOU VERIFY THE PROBLEM.
(IT COULD BE A BAD CAPACITOR ETC.)

HOPE THIS HELPS

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