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

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

One sensor light is blinking green and the other sensor light is blinking yellow. Door will not open or close

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

Posted on Jun 16, 2010

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Vince is right. If you need further help about how to wire it right please let me know the model type or post a photo of the motor head.

Posted on Nov 06, 2012


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98 buick century. Brake lights and headlights not working, but 3rd brake light is. No bli kkers or 4 ways. Need schematic or a good idea where to look. Thanks

Click on the link. This is for stop lamps, Your lower brake lamps are wired through the multifunction switch. The high-mount brake lamp isn't wired that way.
At the rear, stop lamps, right side, dark green wire is voltage for stop lamps, black wire is ground. For the left rear, stop lamp, yellow wire is voltage, black is ground.
At the moment, I think your multifunction switch is faulty?

Apr 17, 2018 | Buick Cars & Trucks

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I have a blinking amber light in my garage door motor? and one of the sensors on the track is yellow and one is green?

the lights on the sensor are the correct colors. the green light is the receiving sensor, and the amber light is the transmitting sensor. If the light on the motor head is blinking, most likely it's blinking a certain number of times, pausing, then repeating the sequence to tell what the problem is. In your owner's manual, there should be a list of what the blinks mean. Watch your opener's light for a few minutes, take note of the flashes, then compare them to your owner's manual. If you don't have one, check your manufacturer's website. If you can't find one there, contact me.

Aug 29, 2013 | Sears Craftsman LiftMaster Chamberlain...

2 Answers


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

There is nothing in the way of the sensors but the garage door won't close automatically. The green light sensor is blinking when open and the other sensor is a constant yellow. Suggestions?

One light should be green and the other yellow. This is normal. Resetting the sensor should fix this problem if the sensors are properly aimed at each other but I need to know the make and model to provide programming instructions for you.

Jan 04, 2011 | Garden

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

Just bought a home with a Honewell trol atemp universal mini zone

because it dosent have a duct sensor - should not be a problem

Sep 03, 2009 | Honeywell Electronic Programmable...

3 Answers

Go down only if I maintain the button pressed until it is close

the problem is with the sensor at the bottom of the railing. We had to replace the photosensor on one of them.

Dec 06, 2007 | Chamberlain Powerdrive PD422D 1/2 HP...

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