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

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I just replaced a 10 yr old Liftmaster with Security with a new model HD200DM. My two cars were able to open the old model with their built-in wireless system but I can't get them to open the new model. One is a Toyota Avalon and the other is a 2005 Mercedes and I have followed the instructions in both owner manuals to program but they won't open the door. What am I missing?

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If your cars are equipped with Homelink you can call their customer service at 1-800-355-3515.

Posted on Aug 25, 2010

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I just purchased Liftmaster 971LM for my 139.53975srt1 Sears 1/2hp garage door opener. It will not program. I have only one working remote that was recycled from my father's unit - it says craftsman...


If the recycled remote is Security + there is no logical reason the new units should not work. If the old remote is a different technology and there have been changes to the opener or a different receiver that could be the problem.

Aug 20, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a liftmaster door opener and a craftsman keyless entry, both are security rated is it possible to program them together? How? Craftsman keyless 139.53684 Liftmaster opener built in 2009 Thanks...


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

Aug 24, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Have two remotes for my liftmaster chamberlain,. i can only get one or the other to work,. so they both work ,. but i cant get them to work together,. nor can i get my lexus built in car opener to except...


Regards the remotes. One of them has reverted to an earlier technology and they will both work but not together. You will need to purchase a new remote (make sure it is the same model). Once you have the new remote you will need to program them. One of your old remotes will work with the new remote and the other will not. Remove the batteries from the bad one and trash it. You will have future problems if you don't.

For your car opener. If it is Homelink you can call this number and I am sure they will help you. You will need to be in your car and at your garage. 1-800-355-3515

Jun 08, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

I CAN NOT PROGRAM MY BUILT IN CAR REMOTE ON MY NEW 139.53985DM


didnt try everything cause if you did, it would work! Get two people and garage door opener. One read manual from car under Garage door" or Homelink while other pushes button. When manual says if this did not work or if you have security plus or rolling code, continue with other instructions. You will need a working remote and will need to pushh learn button on motor logic board.

Dec 25, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door openers gone haywire


do not understand what you mean by can't reprogram openers, How old, Dip switches inside. Security plus. Need more info.

Sep 05, 2008 | Sears Craftsman LiftMaster Chamberlain...

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