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

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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The garage door goes down to about 10 inches off the floor, then re-opens and i get a flashing light which goes off 10 times


I think your garage door safety device has been bumped and is now out of proper alighment. Has it worked properly in the past? Check the alignment of the two boxes (one on either side of the door) to assure they see each other and not the door as it comes down.

The idea of the device is if the light wave is broken, (something goes through the door as it decends) the door reverses and goes back up.

Thanks for your question @ FixYa.com

Aug 08, 2011 | Kitchen Ranges

1 Answer

My garage door starts going down and stops. it goes back up and will not close. one of the sensors is yellow.


take some toilet paper, or some very light rag and dust the RPM sensor over, under, inbetween and in every spot on that darn thing, and bingo, it will work. Its the plastic ribed piece mounted on the end of the motor under opener cover. If something gets under door as door starts to go down, the RPM`s will slow and thats a warning to stop and go back up. With it being dusty, it can`t sense the RPM`s properly and goes into an alarm every single time. Ugg

Mar 10, 2011 | Chamberlain Powerdrive PD422D 1/2 HP...

1 Answer

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...

1 Answer

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...

1 Answer

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

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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