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

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Door will not close

My garge door will not close all the way acts like there is something across the beams but i have cleaned them and made sure they was lined up but it still will not close

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If it is a door sensor problem the main light will flash 10 times when the door reverses. Make sure the small light on each sensor is lit. One sensor is the sending unit and the light should be on all the time. The other is the receiving unit and the light is only lit when they are pointed at one another. If the main light doesn't flash it is another problem. Post back.

Posted on Jun 18, 2009


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When install the door goes down to close but comes back up

You have a sensor circuit that prevents the door from closing. One sensor sends a beam of light across the floor by the door, the other sensor picks up the beam. If beam is interrupted, say by a car, the circuit prevents the door from closing. And if the sensors are not properly aimed it is as if you have an obstruction and the door will start to go down and then reverse it self.

Circuit only works for closing and not opening the door.

Adjust and hook up the sensors as per the intructions.

Sep 15, 2015 | Building Materials

1 Answer

Garage door remote only opens door. It will not close

It is likely that the safety mechanism is being triggered. It thinks there is an obstruction. If there is no beam of light running across the front, it may be cheaper and easier to replace the operator than to service it.
If there IS a beam, make sure it us not obstructed and that it hss not been knocked out of position.
Feel free to contact me if you need more assistance.

Nov 22, 2013 | Building Materials

1 Answer

The sensor light are different colors

The sensors are seeing something directly in line with the beam between the 2 sensors, or your sensors are not aligned so they point directly at each other.

Jan 12, 2013 | Craftsman Sears Liftmaster Garage Door...

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Most likely your safety sensors are not aligned with each other or something is blocking them. There are 2 sensors, one at each side of the door. There are down next to the floor. They will normally be little black boxes that have send/receive sensors. They face each other and shoot a beam across the floor in order to make sure the doorway is clear when lowering the door. If they are not lined up or something is blocking them then the door will not lower. Just check to make sure nothing is blocking them. If not then check to see if the are "looking" at each other by checking to see if they are aimed at each other. There is usually a light on them that will turn green or light up when they are able to see each other. Once you get them aligned then the door should close.
Good Luck and Thank You for using Fixya.

Feb 08, 2011 | Office Equipment & Supplies

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Garage door will not close when using the remote or garage door button. it will open, however. it can be forced closed by holding the garage door down. i have had this problem before . i have...

Check to see if your child/animal security beam is working correctly. It is an "Electric Eye" mounted about 12 in off of the floor on two mounting points and one side shoots an infra red beam across to a receiver. These points must be reasonably aligned to flash a beam (cannot see) from one point to another. This beam keeps the door open if it is interrupted . If it is not aligned, then the door opener sees a problem and will not close the door electrically. You must aligned the beam by bending the transmitter or receiver untill you can close the door by the remote. Also check to see if something placed in the garage is not blocking the beam first.

Jan 06, 2011 | liftmaster Garage Door 1/2 Hp

1 Answer

Remote will open door when remote is hit to close door the light flashes and will not close. The wall unit will close door but the button must be held and released when the door hits the floor.

Make sure there is nothing tripping the IR beam at the bottom of the door. The beam is bounced back and forth between its source and a mirror about six inches off the ground. If something breaks the beam the door will go back up as a safety precaution. Also check to make sure there is nothing directly under the door that stops the doors from completely closing. Even a small rock can send the door back up.

Good luck

Dec 09, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

1/2 HHP lift master. the motor acts like something is in the way

I am assuming the door wont close.

Your safety reversing sensors must be connected and aligned correctly before the garage door opener will close. An obstruction in the path of the sensor will also cause your door to not close.
This sensor is an electronic beam, which is sent between two sending and receiving “eyes”. These eyes face each other and are located just inside your garage door. They may need to be adjusted so the beam from the sending eye is properly detected by the receiving eye. Once the receiving eye “sees” the beam from the sending eye, a green indicator light will glow on the top of the eye.

Jan 03, 2010 | Sears Craftsman LiftMaster Chamberlain...

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Door opens byitself

You have 2 floor photo eyes that run a beam across so that if a kid runs under the door it will go back up. If the door wont close and goes back up I would check to make sure those lights on the 2 photo eyes are lined up properly. Here is a link also Click Me If you cant get it to stay close there is a emergency cable that you can release to close the door until you can get it figured out. Lost of good info here as well. If this Info was useful please rate me and have a great day.

Jun 08, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door Remote

check to see if anything is blocking the beam that tells it something is in the way of the door closing. If there is nothing crossing the beam, make sure the beams are lined up properly. The four blinks are a safety feature so that you do not close the door on anyone or anything. Had the same problem myself once.

Jul 27, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door hard to close have starts to close stops and starts to open again have to keep stopping and reversing door mult times to get closed

There should be two small white adjustment knobs on the side of the unit that you turn with a small flathead screwdriver. These are the load / limit adjusters.

What it happening is it think there is something stuck under the door (like a car hood, etc)

These adjustments are VERY sensitive, so be patient while adjusting them.

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

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