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My garage door stays open about 4 inches. Sensor lights are left yellow and right green.How can this be adjusted?The door opens properly without the going up and down issue. Doesn't close to the floor

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Posted on Jan 02, 2017

  • 6 Answers

SOURCE: Sensor lights not working on door opener

If the sensor light or receiver gets kicked, it can be knocked out of alignment. If it's not aligned, it will act as though it is blocked -- in other words it will open, but not close.
I fixed my buddy's opener not long ago -- you should have two parts of the sensor, near the floor at the bottom of the door. One is an infrared light, the other is a receiver. The receiver should have a little LED on it. This glows green when it is receiving a clear signal from the other side. If your's is glowing red when you can see that the path is clear, try adjusting the aim of the infrared light. You should be able to gently move the light from side to side until you see the LED on the receiver glow green.

Posted on Dec 07, 2008

  • 244 Answers

SOURCE: GARAGE DOOR OPENS BUT WILL NOT CLOSE AUTOMATICALLY

is bulb on motor flashing 10 times. then you have electric eye problem. otherwise, sounds like you need to increase down force a hair. adjustement is on logic board, right knob.

Posted on Jan 15, 2009

  • 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

  • 22 Answers

SOURCE: my craftsman 1/2 hp garage door starts to close and then opens up

I had a simular issue, except mine was that the previous owner decided to mess with all the settings and mounts and screwed everything up.

The problem isn't your force sensors its your downwards stopping sensor on the opposite side of the opener. For me I had to take the entire panel off and replace the sensor back in its holder, but try adjusting that sensor setting (clockwise goes down, counterclockwise goes up).

If that doesn't work then i dunno:)

Also set both force settings in between 0-1, for some reason with mine if i set it higher it would set them off....

Posted on Jul 19, 2009

swolfinor
  • 504 Answers

SOURCE: Garage door closes and then automatically opens half way

ADJUST THE DOWN LIMIT IT THINKS THERE IS AN OBSTRUCTION AND IS REVERSING LIKE IT SHOULD.

TURN THE LIMIT ABOUT 1/4 TURN AT A TIME.

HOPE THIS HELPS

Posted on Jun 05, 2010

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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

Why is the sensor light yellow on my craftsman 3/4 hp garage door opener?


Because you have power to it! If properly aligned, the other one will be green.

Jun 05, 2014 | Craftsman 3/4 Hp Garage Door Opener System...

1 Answer

Garage door opens about 4 inches, stops, then goes back down. No flashing lights at all. One sensor light is green, the other is a steady yellow. What's the issue?


something may be obstructing the door, so pull the red emergency release handle and try to pull the door manually.if you cant move it manually, call for professional help

make sure all snow and debris are clear of the area where the door closes

if there are no obstructions, manually set the adjustment controls on the back side of the opener panel. weather can sometimes change the amount of force needed to open/close. adjust the setting with a screwdriver to no more than 260 degrees, about 3/4 of a turn

Feb 09, 2013 | Craftsman Garage Door Opener 1/2 HP Chain...

1 Answer

When I try to open the door, the garage door will only open approximately 4 inches. Then when I try to close the door, the door closes...then opens to the 4 inch mark and remains here. The 'right' side...


Sounds like a door problem not an opener problem. Pull the emergency release on the opener and make sure the door itself is operating correctly. Soulds like the assist on the door needs adjusted.

Feb 20, 2011 | Garden

2 Answers

Sensor problem with garage door opener. One of them has a yellow light the other a green. The door starts to close than stops. You can close it if you hold the button down inside and the remothe doesn't...


If it moves 6-8 inches and then stops it is most likely the rpm sensor.

Yellow and green are what the lights should be.

Does the led on the wall control blink?? If is does press the lock button.
If it doesn't you will need to reprogram the remote.

Watch the eyes as the door closes, does one of them go off? If so the track may be flexing causing misalignment. (Widen the track near the bottom)

If all of the above don't help check the sensitivity adjustment. Turn it about 1/8 turn clockwise and try the door again - continue this until the door goes full cycle without reversing. If you have to set the sensitivity past 3/4 the door needs to be adjusted.

Jul 20, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

My liftmaster formula one has one sensor light green and the other yellow. no amount of realignment helps this. the garage door will bounce back up when it hits the bottom and won't stay shut. have tried...


One photo eye should be yellow and the other one green. The problem seems to be your down limit to be set too far. When you stand facing the door behind the operator the limit adjustments should be on the left hand side under the light cover. The down limit is the one closest to the door.

Sep 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Left Sensor has yellow led & right sensor is green. Garage closes and then immediately opens. I'm assuming it's the sensor with the yellow led. How do I fix this?


If the main light flashes 10 times when the door reverses it is a sensor problem. Make sure the door isn't hitting the floor and then reversing. This problem will not cause the light to flash 10 times and can be corrected by adjusting the 'down limit' which is on the side of the motor unit.

Jul 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door sensor light on one is green the other yellow. When they are lined up one stays yellow and one is green. When I point the yellow sensor away from the other one the green goes off. Do you think...


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.

Jun 07, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door


sensor got bumped, realign till both lights show green

Mar 26, 2008 | Sears Craftsman LiftMaster Chamberlain...

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