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

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Garage door sensor light lense yellow one is damaged and the green one is working.Garage can't be closed in daytime.Please advise.

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Green light not working yellow light is on why? Please advised

Posted on Dec 29, 2012

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  • Master
  • 3,197 Answers

It sounds like the sun is shining on your door sensor and causing it not to work properly. Try shading the sensors and try.

Posted on Jan 23, 2012

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6 Suggested Answers

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6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

Don Maggard

  • 3197 Answers

SOURCE: 6 month old garage door will work.

On the back of the opener near where all those white wires go you will find 2 controls. One is labeled "up force." Increase this about 1/4 turn.

Posted on May 18, 2009

Door Tech

Joseph Chapman

  • 98 Answers

SOURCE: Garage door sensors out of alignment

The lights are suppost to be yellow (power to photo eyes) and green (lined up).
 1.Check to see if the door is running correctly.
  A. Run the door down and pull the emergency release. See if the door will run easily by itself.
  1. If it runs hard by hand try lubricating the rollers and hinges with silicone spray or some form of lubricant (not WD 40)
  2. If the door is heavy and falls back to the ground, you probably have a spring issue (either broken or needs more tension) in this case call a professional door repair company in your area.
  B. If the door runs fine then check the up force on your operator (the box that hangs from the ceiling). If the light bulb(s) on your operator are on the front and/or back, the force adjustment screw is on the back of the operator. If the lights are on the sides of the operator then the force adjustment screw is on the right side (looking from the back of the operator and facing the garage door). Turn the light blue adjustment screw with the up arrow to a higher number.

Posted on Jan 10, 2009

Don Maggard

  • 3197 Answers

SOURCE: Garage door sensor light on one is green the other

They are doing what they are designed to do. To work properly they must be pointed at one another and to tell when they are aligned the light on the receiving unit turns on.

Posted on Jun 08, 2009

Don Maggard

  • 3197 Answers

SOURCE: My garage door opener won't close the garage door.

Most likely your door sensors have been bumped and are not aligned properly. Make sure they are pointed at one another and the small light on each one is lit and not blinking.

Posted on Apr 30, 2009

Don Maggard

  • 3197 Answers

SOURCE: One of my garage door sensors is yellow while the other is green.

It means your sensors are properly aligned. Are you having a problem?

Posted on Jun 16, 2009

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1 Answer

My garage door opener is a 3/4 craftsman and one light is yellow and the other is green. I put my hand in front of the green light and the green light went off. the other side is a yellow light and it


Hi Vickie,

The safety beam portion of the garage door opener is set up to stop the door from closing if something (car, person, etc,.) is in the doorway.

When the door is open - if you press the hard wired push button (not the wireless remote) the door will either close until shut completely, or begin to close and reverse direction as soon as you let go of the button. When this happens, it *usually* means that a sensor is blocked - and reversing the door motor. If you try yhtis with the remote the door may not move at all or just bump down and stop.

You should re-align the sensors as described in the link below. Good luck!


How to Replace the Safety Sensor for Garage Door Opener Repair Guide Help...

How to Adjust Photo Eye on Garage Door

Nov 03, 2014 | Craftsman Professional 3/4 hp Hydro-Glass...

1 Answer

I'm having to hold the main remote button down continuously to get the door to close. It acts like something is obstructing the path, but it's clear. The sensors have a green light on one and a...


You need to hook those wires back up and then check the door sensors very closely. If the light in one of the door sensors is dim or flashing it will cause your problem.

Sep 12, 2011 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Door suddenly will not close without holding the button down continuously that is inside the garage. The remote button will open the door but not close it. The door starts to close and stops right away.


It definitely sounds like a sensor problem. In normal operation, one sensor will have an amber or yellow light on, indicating power to the sensing circuit. The opposite sensor should have a green light on. If the yellow light is not on there is no power to the circuit due to a broken wire or circuit board failure. If the green light is not on or is flickering, the sensors are not aimed at each other or the light path is blocked.

Aug 04, 2011 | liftmaster Garage Door 1/2 Hp

2 Answers

DOOR CLOSES MOST OF THE WAY AND THEN OPENS. LIGHT THEN BLINKS TEN TIMES. I NOTICED THAT ONE SAFETY SENSOR IS GREEN AND ONE IS YELLOW. PLEASE ADVISE.


Hi. The sensor with the yellow light is telling you that it is miss-aligned, Usually it only takes getting bumped to knock them out of alignment.
I would slowly turn or adjust the positioning of the sensor.
The one with the yellow light should turn green when it is all the way in line so that the beam is completing it's path.

It's out of adjustment, so the sensor is looking at it like there is an object blocking the door from closing.
It's called the obstruction sensor.
It's there as a safety feature, so that the door doesn't come down and smash anything in the opening.

I hope this helps you out.

Feb 04, 2011 | liftmaster Garage Door 1/2 Hp

1 Answer

Chamberlain garage door will not close


See if both sensors stay lit until the door reaches the closed position.

If either light is off or flickers the door will go back up. Try aiming the eyes very carefully. If they are aimed properly. Check the wiring if you move the wires and the light flickers you have a bad connection. If the lights don't come on you may have a broken wire.

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

1 Answer

Door won't close, blinks 10 times, sensor light yellow


Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem or the wiring to them. Nothing else causes this symptom.

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

1 Answer

New eye sensor not lighting up when installed


Make sure the sensors are pointed at one another. Also one of them should say "sending unit" and the other is the "receiving unit". Did you buy them new and from a dealer?

Jun 10, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

One sensor light is blinking green, the other sensor light is bli


the safety eyes are wired wrong on the back of the opener. Check the wire locations.

Nov 24, 2008 | Sears Craftsman LiftMaster Chamberlain...

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