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

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I have a 1/2 hp craftsman opener. Remotes work fine. Wired wall unit has a blinking light on the open button and will not work Lock pad and light pad work but not the operate pad.????

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Try pressing and holding the lock button for 3 seconds to stop the light from blinking. Your wall control may be bad. Usually when that light is blinking it is the remotes that will not work.

Posted on Jul 15, 2010

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1 Answer

Master lift remotes suddenly won't work. Wired panel button works opening and closing door.


Make sure the light in the wall control is not blinking. If it is press and hold the lock button on the wall control for 3 seconds.

Feb 11, 2011 | Sears Craftsman LiftMaster Chamberlain...

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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

My wired key pad in the garage opens and closes the door but the buttom keeps blinking fast. My two car remotes stopped working. My remote key pad on the house works. Whats with the fast blinking and...


Press and hold for 3 seconds the button on the wall control that has an icon of a lock. The light should quit blinking and your remotes will once again work. Holding that button for 3 seconds toggles your openers vacation mode.

Nov 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Professional series, lift master 1/3 hp, the remotes will not operate door but door will operate from wall pad


Check to see if the small light in the wall pad is blinking. If so press and hold the button with the lock icon for 3 seconds.

If this isn't the case your receiver may have failed. The wall button works without the receiver;

I would remove the logic board and look for loose or missing traces on the printed circuit board.

Nov 14, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

The wall button has a green light that is blinking and the car remote will not operate the garage door but the wall button works


this just happened to us today as well. the wall pad has three buttons: one large back-lit button pad to open it and a lock button and a light button. the open button was blinking quickly and would open the door, but the car remotes did not work. I found that by pushing both the "lock" and "light" button at the same time for about 3 or 4 seconds, the back-lit "open" pad stopped blinking and went to steady green. I went back to the cars and checked the remotes there. both opened the door.

hope this helps someone out there

Mar 31, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

All remotes stopped working on genie opener, hardwired wall switch works fine.


Your lock on the opener is probably engauged. On the wall control there is a button labeled lock. Press and hold this button for three seconds. Your remotes should work now. If they still do not work, you need to reprogram the remotes. Press the learn button on the back of the motor and then press and hold the remote button. The light will blink once. Repeat this step on the other remotes.

Feb 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door not opening


First, check the safety eyes. There should be a light on on each eye. If not realign until they come on. On the wall button if the green light is blinking press the lock button on the wall control for three seconds. The light will go solid. If either of these do not fix respond with more detail and I will help.

Feb 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

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