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.
Thanks

Posted on Nov 06, 2012

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1 Answer

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...

1 Answer

I have a Chamberlane Lift Master Professional I went to open it yesterday and it would not open. When the button is pushed the unit just clicks and the controller light is blinking 5 times then pauses and...


The code it is flashing is "RPM sensor or motor overload." It is not a door sensor problem. The RPM sensor is a small circuit board just in front of the motor.

Mar 25, 2011 | Sears Craftsman LiftMaster Chamberlain...

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

We have a 1/2 hp garage door opener and it is blinking 4 times. it will shut with continuous pressure on the button but not with a single press. the sensors are different, one has a continuous yellow light...


The most common reason for the green sensor to flash is because they are not pointed directly at one another.

  1. Check each sensor for a steady glowing indicator light. If both indicator lights are on, or if one indicator light is flickering, the sensors may be slightly misaligned. To check for misalignment; obstruct the beam of the sensors so that they cannot see each other. When the beam is blocked, the indicator light on one of the two sensors will temporarily go out. This is the receiving sensor. Remove the obstruction and loosen the wing nut on the back of the receiving sensor. Adjust the receiving sensor until the green indicator light goes out, if not already out, then realign until the green light is bright and steady, then retighten the wing nut. This usually takes a couple of attempts before it is back in alignment.

Jan 01, 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

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

5 blinking lights


The code for 5 flashes is RPM sensor or motor overload. Did you remember to put the black plastic interrupter cup on the end of the motor shaft? Also check the small quick disconnect on the RPM sensor printed circuit board. Make sure it is connected securely.

May 04, 2009 | Sears Craftsman LiftMaster Chamberlain...

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