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

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Change code on keyless entry. Now the remote does not work.

The two should not have anything to do with each other.. Right???

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Did you clear the codes existing in the unit? (Press and hold the learn button; LED light will stay lit for approx. 6 seconds.) If you have remotes that have dipswitches, pop the battery cover off and make certain that all switches are set identically in each remote. Now, press the learn button on the main unit and immediately release. While its LED light is lit, press the button on ONE of the remotes only. They will ALL be programmed at this point. Now, press the learn button once more (quickly and release) and enter your number code on your keypad and press enter. It should be programmed now, too.
I was having a similiar problem, and this turned out to be the solution. Before, I was programming both remotes, not knowing as I did so that by programming one, and then another, I was UNprogramming the the first as well as the keypad.
I hope this works for you. It did for me.

Posted on Jan 23, 2009

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I have a craftsman garage door opener, of which I tried to program a new remote. but it did not program. in the event I accidently errased my keypad password. How can I reprogram the keypad, i cannot...


Hello there,
It actually depends on what you are trying to program. And these instructions apply only to openers that do not have dip switches on them.
Remotes: push don't hold the colored learn code button all models have different colors. After pushing the button hold the remote behind your back and push it three times. On the third time the door should run.
Keyless Entry: Program the code you want into the keyless. Push the colored learn code button and then enter the code and push enter three times slowly. on the third time the door should run.
Home-Link. Hold the two outer buttons until the blinking pattern changes. Then hold the button you wish to program and point and click your remote at it. Push the colored learn code button and push the homelink button three times.
There are two models of the Wireless Keyless Entry System, the 740CB and the 940CB. The 940CB is for use only with Security+® garage door openers having an orange/red smart/learn button. The 740CB will work with all openers manufactured since 1990 that have a yellow, white, gray, or green smart/learn button. It will not work with Security+® openers.
To program the keyless entry, first locate the smart/learn button. On our chain drive models, this button is on the end farthest from the door. On our belt and screw drive models, it is on the right side as you face the door from the opener. You simply press and release the smart/learn button. You now have 30 seconds to enter your four digit PIN number into the keypad and hold the enter button for five seconds. Wait one minute and test the keyless entry by entering your four-digit PIN number and pressing enter.
With some Security+® models, you can also program your Model 940CB Wireless Keyless Entry without climbing a ladder, right from your Multi-Function Control Panel. Simply enter your pre-selected code and press and hold the enter button on your Keyless Entry. Then press and hold the light button and the pushbutton on your Multi-Function Control Panel. The garage door opener lights will flash to confirm that the Keyless Entry has been successfully programmed.
Hope this helped you solve the problem. All the best my dear friend. Elect_Comp

Sep 02, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door sytem was working fine. I lost a remote, so after getting a new one, I programmed it into the door opener. After that, i found the remote I programmed worked, but my wife's remote did not....


Ted, it sounds like normal garage door function. Here is my take, you were pushing the button in a fashion that was to clear all remotes. This is done through either pushing wrong button, or pressing the programming button for too long.

Sometimes you need an assistant to be able to activate the wireless key, soon enough after pressing programming button. Get a ladder and a light, climb up and read the directions carefully on your opener. Try to add just the keyless system.

If that does not work,Get an assistant, and do the whole process again, including the keyless.

There are two distinct processes, adding and clearing, and it may be easy to invoke the wrong one.

Your system uses rolling code/invite system. Rolling code relates to a handshake betewen each remote and the base. The code is changed at each use, for each remote. (the keyless /wireless also).

Been there, done this. all for an additional second or two of button press.

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1 Answer

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Coding the keypad will not affect the remotes if you follow these directions.

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 your keypad and key in a four digit code and press enter.

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1 Answer

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