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

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Garage door open by its self - Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Look at the LED light next to the SMART/LEARN button on rear of the motor unit. You may need to remove a light lens cover in order to see it. If the light is flashing rapidly this means you have a stuck button on one of your remote controls. Take the batteries out of each remote control. When you remove the batteries from the bad remote, the light will stop flashing. This remote needs to be replaced.


If one of your neighbors remote controls is inadvertently programmed into your receiver, you door will open when their remote is activated. If this happens you will need to clear out your receiver and reprogram your remote controls. Press and hold the smart/learn button for 6 seconds or until you see the small LED light near the button turn itself off. If the above steps have been followed and the symptoms continue, there may be an electronic short in either the wall control button or the receiver logic board. In this case, remove the wall control wires from terminals 1 and 2 on the motor unit. Should the symptoms persist after the wires are removed, replace the receiver logic board. If the symptoms stop with the wall control wires removed from the motor unit, replace the wall control button, and the wires leading to the wall control button.

Posted on Nov 18, 2009

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My garage door open by self after while


Just a thought. My neighbour had her door open by itself every once in a while and come to find out when another neighbour went to open his door he would hit his opener while still on the street once in a while and his opener was opening the other door as well. Try reprogramming yours and see if that works.

Dec 23, 2016 | Building Materials

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Whisper Drive garage door opens and closes by its self


try changing frequencys you might have a neighbor close by that is using same frequency as you causing your door to open when they open theirs

Jul 18, 2012 | Home Security

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I installed a Craftsman garage door a couple of weeks ago and all of a sudden it keeps opening by it's self. It is model #139.53918D what is causing this?


Make sure the door isn't closing too far. This will cause it to open. Your opener comes with a warranty. Call Sears repair.

Sep 04, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door closes but opens inmediatelly and partially,only 1 foot and a half


With the garage door up pull the release cord to disingage the garage door it self in the up position. You can skip the disengaging step, But,It saves ware and tear on the motor.

Then using a step stool you will find limit adjusting plastic slots/screws on the side of the opener.

The left screw is for garage door down.

I would turn the left screw clockwise 1/2 turn or less. then activate the remote opener. noting which way the latching mechanism moved. and so on.

It may take a few adjustments with this proceedure to get it perfectly closed. Then activate the remote to re-engage the garage door it self.

Also, LiftMaster has a web site that you can check out.

Jul 23, 2011 | liftmaster Garage Door Limit Switch...

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My garage door only opens partly during cold temperatures.


interesting, Have you pulled the string and tried to open it manually? If so is it hard to open, If so something could be freezing int there, such as the grease (Although Highly Unlikely) If its easy to open, its something with the opener its self, I would call the manufacturer, have them look at it.

Nov 24, 2008 | Sears Craftsman LiftMaster Chamberlain...

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