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

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My garage door goes almost all the way down, then reverses back to the up position?

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You can try increasing the 'down force' which is a control on the rear of the motor unit. If the main light is flashing 10 times when the door reverses it is a door sensor problem. Make sure they are pointed at one another.

Posted on Aug 28, 2010

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The door is going down within about two inches of the floor and then goes back up. It has been doing this occasionally for the past few weeks, but now it will not stay down. The light flashes 10 times each...


Anytime the light flashes 10 times when the door reverses to the open position it is a door sensor problem. Make sure the small light on each sensor is lit and not flickering. Tweak them a little. If you cannot get both lights to come on you have bad sensors.

Sep 16, 2011 | Sears Craftsman LiftMaster Chamberlain...

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When I try to close my garage door --4100 model-- the door travels part way down, then reverses and goes to the up position. I can force it closed by keeping the garage door wall switch continually...


Check your 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 little. If you cannot get both lights to come on you have a bad sensor.

Dec 30, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Hi. My garage door opener is having a problem closing. It goes about 1/2 way down then reverses to the open position. Its a chamberlain 1/2 hp heavy duty. Any suggestions?


Hi swilson.... on the motor you will find adjustment screws. One to adjust the up setting and one the down. Also one for the pressure setting. Usually when the door is behaving as yours is the pressure setting needs to be tightened a bit so that it does not reverse direction with the tiniest bit of resistence. Make small adjustments so that you do not end up with a door that is a safety hazard in that it will not reverse when it hits an obstacle. Joe

Thanks for choosing Fixya!

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My Sears Craftsman K1026 05/94 139.53779 HBW0709 appears to be locked. my garage door goes down and immediately comes back up


If the main light flashes 10 times when the door reverses it is a problem with the door sensors. Make sure they are pointed at one another and the small light on each one is lit and not flickering. If you cannot get both lights to come on you have bad sensors.

If the door hits the floor and reverses to the open position but the main light does not flash it is because the door is traveling too far. Locate the 'down limit' control on the side of the motor unit and turn it in the opposite direction of the arrow printed on the cover. Some tweaking may be necessary.

Jul 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+: Door goes down and when it reaches the bottom, it ...


If the door hits the garage floor and then reverses to the open position you need to adjust the 'down limit' which is on the side of the motor unit. Turn this control in the opposite direction of the arrow printed on the cover. Some tweaking will probably be necessary.

May 16, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I cannot get the door to stay closed it cycles down the goes right back up after it reaches the floor


If the door reverses to the open position but the main light on the motor unit does not flash it is because the door is traveling too far. On the side of the motor unit you will find the 'down limit' control. Turn this just a tad in the opposite direction of the arrow printed on the cover. Some tweaking may be necessary.

Jan 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door goes all the way down and then reverses. there are no apparent obstacals


If the door hits the floor and pauses for a couple seconds and then reverses to the open position it is traveling too far. Locate the 'down limit' adjustment on the side of the motor unit and turn this control in the opposite direction of the arrow printed on the cover. Some tweaking will probably be required.

Jan 06, 2010 | 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

My garage door bucks like a bronco


You have a door problem. The reason the door is reversing to the open position is because when it bucks the safety senses something wrong. Release the door from the opener and operate it by hand. You should find something.

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

1 Answer

The door reverses back to open position instead of closing


SOUNDS LIKE A SENSITIVITY ISSUE UNHOOK THE DOOR AND TRY IT MANUALLY TO BE SURE IT DOESN'T BIND OR IS TOO HARD TO OPEN OR CLOSE.

IF ALL IS WELL CHECK THE SENSITIVITY SETTINGS ON THE BACK OR SIDE OF THE OPENER.

YOU WANT THIS SET AS LOW AS POSSIBLE AND STILL OPERATE THE DOOR WITHOUT REVERSING.

NOTE: THE FULL RANGE OF ADJUSTMENT IS ONLY ABOUT 3/4 TURN SO MAKE A VERY SLIGHT ADJUSTMENT AND THEN TRY IT AGAIN.

HOPE THIS HELPS

Feb 20, 2009 | Sears Craftsman LiftMaster Chamberlain...

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