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

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Opener not working properly

My door goes down part of the way and then goes back up.

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Garage doors have safety sensors so the door does not hit the car or anything else that gets in the path of the door. Check to see if anything is blocking sensor mounted on the track near floor. Also sensor my have been bumped and not in alignment. Hope this helps

Posted on Aug 24, 2008

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SOURCE: Garage door started not working properly.

Check your door sensors.

Posted on Feb 17, 2011

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SOURCE: Garage Door Opener Closes properly but then goes

Check sensors in doorway.

Posted on Nov 07, 2011

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We just replaced a broken spring (re[laced both sides) on craftsman garage door opener and now the door won't shut all the way. It goes down to about 12" from closing and then goes back up.


YOU COULD HAVE THE WRONG SPRING OR NOT ADJUSTED PROPERLY. YOU COULD HAVE AN OPERATOR ADJUSTMENT PROBLEM.

HOW DOES THE DOOR WORK MANUALLY??

IF IT IS HARD TO PUSH DOWN AT THE BOTTOM - SPRING PROBLEM - IF IT WORKS AND CLOSES VERY SMOOTHLU AND EASILY THEN YOU COULD ADJUST THE DOWN SENSITIVITY - JUST A LITTLE.

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

2 Answers

My older Craftsman garage door opener comes down about 6" & then goes back up. I just replaced all the rollers o& the opener worked fine. Then I tightened the chain on the opener & it worked ok...


If the main light flashes 10 times when the door goes back up it is a door sensor problem. You chain should sag just a little. If you tighten it too much it will click as it goes over the sprocket. You can increase the down force which is an adjustment near where all those white wires go. A 1/4 turn should be enough. Release the door from the opener and operate it by hand. It should move freely and when you have the door approximately waist high it should stay put. Neither raising nor closing.

Jan 11, 2010 | Sears Craftsman LiftMaster Chamberlain...

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Garage door goes down 3/4 way down then goes back up and flashes 10 times


Your door sensors have probably been bumped and are misaligned. They must be pointing at one another to work properly. Each of them has a small light that should be lit. If you cannot get both lights on the sensor to come on you probably have a sensor that has quit working.

Oct 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

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Garage door will not go down


The only thing that will cause the main light to flash 10 times and the door to reverse to the open position is a door sensor problem. Check to make sure one of the sensors is not blinking ever so slightly. It can be hard to see. Also make sure direct sunlight is not hitting the lens. Try shading them.

Jul 11, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The garage door goes up, but will not go down. i push the opener


Make sure the door sensors are aligned properly. They must be pointed at one another and the small light on each one should be lit and not flickering.

Jun 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Doors open but will not close


Check the laser. Make sure that the safety lasers are properly alligned, If the bottom sensors next to the floor on the door rails sounds like it has been moved and just needs to be realigned. Pretty simple work to take care of the problem unless the sensor is broken

Apr 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garrage door opener ability to close the garrage door


HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.
WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.

ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH OTHER?

Mar 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman garage door opener won't close completely


look on the side of the openeer usually lekt looking at it from the rear theese are your travel adjusters one turn = 2" travel normally

Jan 07, 2009 | Sears Craftsman LiftMaster Chamberlain...

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