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

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Remote model 139.53778 trying to code garage door opener model 41a3621

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Garage Door Remote Not Working Consistently

Lift Master Security Plus remote works only intermitenly, It seems to lock after a few tries, Works from inside garage, Seems to lock up after few tries, Wall opener fine. Changed batteries several times. Can't understand why it works and then doesn't. Tried cleaning sensors and wires,

Posted on Oct 29, 2008

  • 4 Answers

SOURCE: remotes quit working for garage door

I had the same problem with my Craftsman opener but different model. However to fix this I simply followed the instructions that came with the opener and reprogramed the remote to the opener. The instructions are in your owners manual and are pretty straight forward.. John

Posted on Dec 11, 2008

  • 3197 Answers

SOURCE: Garage door opener remote won't work

meerkat1 your receiver has quit working which is part of the logic board. The logic board runs around $80.00 for the part alone. Might be time to get a new opener.

Posted on May 12, 2009

  • 3197 Answers

SOURCE: Craftsman Model 139.53684 Keyless entry doesn't work

The remotes and keypad use the receiver which is part of the logic board.'t The button on the wall is hardwired and doesn't use the receiver. You might pull the logic board and check for bad connections on the printed circuit.

Posted on Nov 06, 2009

  • 3197 Answers

SOURCE: Craftsman Model 139.53684 Security+ Keyless Entry

To answer your question the opener is in vacation mode. Press and hold for 3 seconds the button on your wall control with the lock icon. The green light will stop flashing and you will be back in business.

Posted on Dec 08, 2009

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We had a 1/2 horse opener with the model # 41A5021-3C in our garage .I put up another opener 41A3621 .Would like to know the wiring for the sensors and wall switch openers..The courtesy light comes on and...


The wiring should be.

Terminal #1 - White wire with red tracer from wall control.

Terminal #2 - White wire from wall control and a white wire from each of the sensors.

Terminal #3 - A white wire with black tracer from each of the sensors.

Apr 18, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opener remotes not opening garage door.


You have to sync the remotes to the new code. For older remotes, you can open the remote and match the pin settings.

For newer remotes there's a button that you push in the back of the opener that sets in program mode (for Chamberlain). When you push the remote button, it will acknowledge the remote is programmed.

If this doesn't help, comment back on your particular model and we'll help you with the solution.

Jan 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster Model 976LM


can you program your remote for another chanel on this remote?
or do you have a second remote to try with?

Jul 28, 2008 | Sears Craftsman LiftMaster Chamberlain...

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