Question about Craftsman Sears Liftmaster Garage Door Opener Safety Beam Sensor Kit 41a5034

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The sensor light are different colors

The garage door is not staying closed. One sensor light is green and the other is orange. Does this mean anything? Why won't the garage door stayed closed?

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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.

Posted on Jun 15, 2014

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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...

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3 Answers

Garage door light blinks but doesn't stay on


Three blinking lights & door won't close by Candi
(Winston-Salem, NC)
Garage door will not open and close with remotes. Three blinking lights occur when we try to close door. What does this mean? It is a Linear unit.

I will assume you mean that your garage door will open with your remote but will not close. It should close if you press and hold the wall control button until the door is fully closed.

If that is the case, the 3 blinking lights indicate that your garage door's infrared safety beams are not properly aligned.

1) Check that the operator has power. The green lights on the sender and receiver should be lit.

2) If the receiver's green light is on, but the red light is off, the receiver has power but is not detecting the infrared beam from the sender. The red light might flash when the beam is partially detected. This can be caused by
mis-alignment or something blocking the beam.

Adjust the safety beam sender and receiver while watching the receiver's red light (stay out of the beam while aligning it). When the red light stays on, the beam is aligned and your garage door should operate normally.

http://www.linearcorp.com/pdf/manuals/LCO75.pdf

NOTE: If the receiver's red light remains off, check for:

1) Dirt on the receiver's lens,

2) Sunlight shining into the receiver's lens,

3) A short in the safety beam wiring (from staples or at the operator terminals).
http://www.linearcorp.com/pdf/manuals/LCO75.pdf

Dec 02, 2013 | liftmaster Garage Door 1/2 Hp

1 Answer

Garage door will not stay closed - one sensor is showing a green light and the other one is showing an orange light - i have tried to adjust position with no luck


When the two sensors are completely aligned, both sensor will show green lights. Usually the green light is your sending side and the orange/red side is the receiving side. You can measure the distance from the ground on the sending side and then adjust the receiver end to the same to get you in the general ball park and then fine tune it from there.

Jul 10, 2011 | Vacuums

1 Answer

Ok so I am having a problem with craftsman garage door, The sensor light are right on green and one orange, but i still have to hold down the button in the garage to shut the door. Also today i thought...


If when you try to close the door the main light flashes 10 times and the door starts down and then reverses to the open position you have a door sensor problem. Make sure the lights in the sensors are not flickering ever so slightly. The color of the lights doesn't mean anything. The keypad sounds like a separate problem. Make sure the battery is good.

Apr 07, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door will go down until it gets close to the sensors (transmitters) and then it hesitates and goes back up. One of the sensors has a constant green light which tells me that it works properly, but the...


The sensors have to see each other in order for the system to work. If the beam is interrupted, it will cause the door to go to the open position. It sounds like the sensors are out of alignment. When the door is closing, it moves a sensor slightly and this breaks the beam, door reverses and opens. Work the sensors so that they are both aimed perfectly at each other. I believe that the amber light will change to a different color when the sensors are aligned.

Jan 29, 2011 | liftmaster Chamberlain Garage Door Opener...

1 Answer

I have liftmaster professional garage door opener. it opens ok but does not close with remote and light keeps flashing on garage door opener. I checked both sensors and seems like the sending sensor light...


If your sensors are not pointed at one another the light on one of them will go out. Tweak them a bit. If you cannot get the light to come on then your sensors are bad.

Oct 25, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Garage door is not opening or closing. One of


depending on model, both are green or one green/one orange. that is not your problem, however you really do not give me much to work with. "It does not work". Does chain move? Does motor run? What is you hold wall pushbutton? Give more info.

Apr 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage sensor problem


The colour on the sensors doesn't change.
One is orange constantly and the other is green when detecting a signal from the orange sensor.
If the green is flickering, they are not adjusted correctly.Move the green sensor until you get a good solid green. Holding the wall pad button down, just bypasses the sensors.

Try adjusting only the sensors so that they are solid.

In addition, check the little yellow light on the back of the machine and count the flashes.
The number of flashes will tell you what the error is in your manual.

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