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

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Sears garage door opener , #139.53513.

Will only run in one direction , up, even with the chain off .

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How do you install an electric eye to the model 139.53513

Posted on Aug 30, 2009

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Remove the cover and take a look at the limit switches. You can tell how they work just by looking. If the up contacts never touch the logic board will not be satisfied that the door is open. Adjust the up limit so that they touch with the door open and try. You may have to tweak this adjustment a bit to get it right.

Posted on Jun 18, 2009

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Posted on Jan 02, 2017

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SOURCE: motor runs but door does not open

you have a stripped gear on your opener. Replace gear and sprocket kit

Posted on Feb 08, 2009

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SOURCE: Garage door chain is sagging

If the chain is adjusted properly the chain will sag slightly on one side when the door is closed and on the other side when it is open. It should not sag enough that it is dragging on the T-rail. You can adjust it at the trolley. If you over tighten it you will hear a clicking sound when the opener opens or closes.

Posted on Jul 28, 2009

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With my door closed, i push door button to open and the chain and opener continues inthe closing mode. any help?


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Jan 10, 2016 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears garage door will not reverse. It will not close the door. Only goes 1 way has been working for years no adjustments have been done problem occurred all of a sudden


Check to see if the trolley is jamming against the bolt just in front of the motor unit. If so, loosen the chain enough that you can run the opener until it closes. While the door is closed locate the 'up limit' control on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

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

1 Answer

Door opens all the way, won't close, gets the signal but won't reverse directions...


If your door is opening so far the trolley jams against the bolt in front of the motor unit you will need to loosen the chain until the tension is relieved from the chain. Run the opener until the door closes and while the door is closed locate the 'up limit' control on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Dec 19, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftman door opener brand new wont work?


Sounds like the drive gear is stripped. Remove the cover and take a look. It is white nylon and is just in front of the motor.

Jul 04, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door opener moves about 8" then reverses direction before touching the limits


Remove the cover and take a look at the drive gear. It is white nylon and is just in front of the motor. It is most likely stripped. You can purchase a new one at Sears or any good door opener company. It comes with instructions.

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

1 Answer

Garage door will not open


You can fix this by loosening the chain enough that you can lift it off the sprocket. Then run the opener until the sprocket turns counterclockwise and stops. Now with the door in the open position replace the chain. This will get the chain running the right direction. You will have to adjust the open and close limits along with the force adjustments but that will all be covered in your owners manual.

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

1 Answer

Garage door opener (chain) motor runs in reverse. Trolley slides forward trying to close door, even though it is closed, instead of sliding toward motor to open door. Happened out of the blue - was


Loosen the chain enough that you can remove it from the sprocket. Run the opener until the sprocket turns counterclockwise and stops. With the door in the open position replace the chain. You will probably need to adjust your open and close limits per your owners manual.

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

1 Answer

Motor is driving only one direction counter clockwise that closes


TRY UNPLUGGING FOR ABOUT 5 MIN.

THIS RESETS THE CIRCUIT BOARD.

IF THIS DOESN'T HELP TAKE OFF THE COVER AND LOOK AT THE LIMIT SWITCHES IT MAY BE RESTING AGAINST THE UP LIMIT - THIS WOULD TELL THE DOOR TO CLOSE - THE CHAIN MAY NEED TO BE SHIFTED - WITH THE DOOR FULLY CLOSED AND THE OPENER RESTING AGAINST THE CLOSED LIMIT REINSTALL THE CHAIN. & THEN RECHECK ALL ADJUSTMENTS

HOPE THIS HELPS

Dec 22, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Opener will not reverse


FIRST YOU NEED TO RESET THE CHAIN .

Unplug power
Release the door from the opener close the door manually. take the chain loose and slide the traveler down to reengage with the trolley. Plug in power, run the unit with chain off untill it completes a clockwise cycle and stops. reconnect the chain and set tension.

Adjust the chain tension.

If it still moves 6-8 inches and flashes 5 times. the problem is in the rpm sensor.

Full diagnostics are in the owners manual - FREE at
http://help.chamberlain.com/help/en-us/InstructionManuals

Oct 06, 2008 | Sears Craftsman LiftMaster Chamberlain...

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