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

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Door opens on its own

I just installed a craftsman model 139.53985dm door opener. It will open and close the door without anyone touching the remote or the wall mount. There is no pattern to its behavior. All of a sudden the door will open and on some occassions close itself. There is nothing in the manual to change frequency....Does anyone have the same problem or better yet a solution???

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  • jingle1943 Mar 12, 2009

    door opens on it's own, sometimes it will close on it's own.....It is a liftmaster

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U have to erase all memories in the receiver.. push the learn button for like 10 sec.... and memorize again ur transmitter by presing the learn button once and the the transmitter button... try it again..

Posted on Mar 10, 2009

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I have a Sears craftsman model 139.53637SRT garage door opener. My remote has not worked in a long time. I use the wall control button and have to hold the button in order to open or close the garage door....


It sounds like your door sensors may be bad or misaligned. Make sure the small light on each sensor is lit and not flickering. That could be the cause of your having to hold the wall button down until the door is closed. You can buy a universal remote but if you only had one remote before it could be the receiver that has quit. A new remote would not fix that but the only way to find out is to try.

Aug 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door opener opens with remote but will not close with remote. will open with wall button but button must be held down until door touches floor to close


Check the door sensors. Make sure they are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have a bad sensor.

Nov 05, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My two door garage was only not closing by remote was only closing by inside the garage with holding the botton till closed.i touched the side botton of the system now only make noise without opening or...


Sounds like your drive gear may be going bad. Remove the cover from the motor unit. It will be obvious if the gear is bad. Also check to make sure the sensors in the doorway are pointed at one another.

Oct 05, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I just installed a sears craftsman 1/2 hp garage door opener. when i close the garage door with the remote the chain track bends up just about 12 inches before it closes all the way, and this only happens...


What is wrong is you need to adjust the limit on the door when it comes up. What it is doing is coming to far back on the track. You need to push the back limit forward away from the motor so the door does not come back and drop down on the inside of the garage. The opener is trying to push the door up hill to get it to close that is why you are getting the bend in the track.


Good Luck

Oct 19, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Motor wont run on craftsman opener


You need to remove the cover and look at the drive gear. It is probably stripped. I really recommend a technician to repair your door.

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

1 Answer

Opening & closing by itself


above would not explain unit running in middle of night after door had been closed. I to would suggest taking off wire from motor (white and red). if problem stops, you have a short in wire or a bad pushbutton.

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

1 Answer

Garage door won't close with remotes


Yeh, read manual. Do both sensors have led lit. try aligning. you have safety beam problem,

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

2 Answers

CHAMBERLAIN WILL NOT RESPOND TO REMOTES FROM STREET.


Sounds like "cross talk" interfence from the other operator. You can get a plugin external reciever that should work with your current remotes. Try to get as much distance as you can between the working operator and the new reciever.

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

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