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

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Neighbour's garage door remote opens my garage door even in lockout mode

My own garage door opener won't open the garage door but my neighbour remote does when lock out mode is on. The opener is a Sears Craftsman Model #13953910. Neighbour has a genie. I already tried erasing the existing code by pressing the learn button but it does not go out by itself after the 6 seconds or longer. After trying the reset, the universal remote can still opened the door despite it not going through the learning mode. The problem is the same for the two garage door opener in my house so I don't think it's the logic boards. Thanks in advance for the suggestions.

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Sears garage door opener

I just found the solution for my 'ancient' Sears garage door opener, model # 139.655000, and I figured I'd share it.

There's a separate radio module, wired to the main opener. This module is small, has a short wire/antenna, and plugs directly into an outlet.

There's a manual open/close button on this module (I didn't realize this until I got up on a ladder). This button is also a removable cover; underneath it is a "smart actuate" button -- this is your learn button.

What I did was: unplug the radio module. Pry off the cover. Plug the radio module back in. Hold down the button on the remote. Press the "smart actuate" button. This programmed my remote successfully!

Posted on Sep 21, 2009

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SOURCE: Trying to clear the codes from my Garage Door

In most cases, when a garage door opens or closes by itself, or when you find your door open, upon returning home, the problem is due to a short somewhere. This short is most likely to be in one of two places: either in one of your transmitters or in the wall button or its wiring.
When there is a short in your garage door transmitter, you will often find the garage door is up upon returning home, even though you know you closed the door when you left the house. A short in your transmitter causes a continues signal to be sent. As you are pulling out of the driveway the garage door closes fully and appears to stop, but as the carriage and arm run past the down limit and hits the header bracket it reverses, and the door begins to open, just as you start driving off down the road. You come home to find the garage door is up, as if someone else had opened your door. The best thing to do to troubleshoot the garage door problem is remove the batteries from your transmitters and try operating the door from the wall button. If the problem is intermittent, you may want to do this for a day or two to eliminate the transmitters as the culprit.
If the problem persists, try removing the wall button wire at the motor head to ensure it is not a short in the wire to the button, then try operating the garage door with the transmitters only. If it stops the problem, replace the wires and test the wall button. It is a process of elimination.


Posted on Mar 29, 2010

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My liftmaster will open with the remote but to close the door, we have to hold down the wall unit. It starts to close, jerks to a stop, then we have to press and hole the button and it closes.


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Neighbours remotes open my garage door


It is very important to erase the memory of your unit and then reprogram your remotes. Erase the memory by holding the smart/learn button in for 6 seconds. None of your remotes or wireless keypad will work. Now program your remotes this way. Press and hold the button down on your remote and then press and immediately release the smart learn button.

If you have a wireless keypad program it like this. Press and immediately release the smart/learn button and then walk over to your keypad and key in your 4 digit code.

I would make sure your neighbor isn't using his opener when you are programming your keypad.

Oct 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

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