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

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Remotes don't work, keyless entry won't work, wall remote some

The garage door will open & close with the wall remote, but you have to hold it until the door either opens all the way or closes all the way. The hand remotes don't work, the keyless entry won't work. One of the remotes will start it, but the door doesn't move. The lights blink for about 5 seconds, maybe a little longer.

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  • Master
  • 3,197 Answers

Check to make sure the door sensors are pointed at one another and the small light on each one is lit and not flickering. If you cannot get both lights to come on then your sensors have failed.

Posted on Jul 13, 2010

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Posted on Jan 02, 2017

  • 3197 Answers

SOURCE: how is the keypad atached to the wall. I cant get

Open the battery compartment and remove the screw you can see. Then using the heel of your hand hit upwards on the bottom of the keypad. It will slide off the hidden screw.

Posted on Mar 29, 2010

  • 3197 Answers

SOURCE: My lift master security plus keyless entry pad for...

You can try programming it but first make sure the battery is good. 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 any 4 digit code you like and press enter.

Posted on May 24, 2010

swolfinor
  • 504 Answers

SOURCE: keyless entry pad for garage door opener

THE FREQUENCY OF THE UNITS ARE PROBABLY NOT COMPATABLE THEY CHANGED ABOUT 2 YEARS AGO.

SORRY - I THINK YOU NEED A NEW KEYPAD TO GO WITH THE NEW OPENER.

Posted on May 29, 2010

  • 3197 Answers

SOURCE: Some reason keyless entry won't open my garage

If that keypad quit after working since 1997 and a new battery didn't get it going it has just gone bad. The model number listed for your opener is now 53876.

Posted on Oct 04, 2010

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2 Answers

Remote won't work but keyless entry does on garage door


If the light in the wall control is flashing press and hold the lock button for 3 seconds. Your remote should now work.

Jul 23, 2012 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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...

2 Answers

I have a 3/4 hp model 139.53990D from sears. My reomtes have quit opening the door. they will close it. The light on the control console blinks very lightly, not like when the lock is set. Door works...


The symptoms you give are exactly the way it is when the lock function is used. The wall control and the keypad will work but not the hand remotes. If holding the lock button for 3 seconds doesn't change it you should hold in the smart/learn button for 6 seconds. This will erase all remotes from memory and only the wall control will work. Now program it for the remotes and the keypad.

Jan 21, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Our remotes (2 for the car and a keyless entry) stopped working. We erased everything (and checked to make sure our remotes weren't working) and reprogrammed all remotes. They work, but our neighbor's...


Make sure your neighbor doesn't have a remote with a sticking switch. Often times a person will stick an extra remote in a drawer and then place something on it that holds the button down. Try programming your remotes this way just in case you didn't.

Press and hold the button down on the remote while you press and immediately release the smart/learn button. Sometimes it can help if you are in the garage when you program your remotes this way and it will drown out any distant signal.

Nov 20, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman Model 139.53684 Security+ Keyless Entry Garage Door Opener... Green light flashing on door control push button. Remotes no longer work. Can open and close garage door from keypad. Why is light...


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.

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

1 Answer

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.

Nov 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Some remotes work others only turn lights on and off


possibly bad relay/wireless board? keyless entry uses same board?

Aug 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Only Keyless entry or remotes can be programmed but not both


If you can program your remotes but when you program your keypad the remotes quit working and vice versa you have either the wrong keypad or it has reverted to an earlier technology. Make sure the keypad is for your specific model door opener.

Jun 25, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opening/closing problem


Could be a bad wall button or a smashed wire.
Anytime a door opens and/or closes by itself, or remotes work intermitantly I look for a smashed wire between the motor unit and the wall button or a bad wall button.

If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door or interfere with the remote.

Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.

The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.

The test is to disconnect the push button wires at the power unit. If the self operation / interference stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.

HOPE THIS HELPS

Jan 27, 2009 | Sears Craftsman LiftMaster Chamberlain...

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