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

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On my garage, one sensor green light is on other sensor is blink

One of my sensor light blinking and garage door does not open or close

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Your safety eyes are not pointing at each other. Aligning them should fix your problem

Posted on Jan 18, 2009


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The unit is displaying a sequence of 5 flashes with the amber light. When I try to open the door, it will only go forward and backward aprrox. 1 ft. Any suggestions on what I should do?

Craftsmsman 1/2 HP opener indicator light blinks five times ...

? 0:29
Apr 28, 2012 - Uploaded by bship452
Then showing the amber indicator light blinking 5 five times, stops ... push remote to operate opener, you hear a clicking sound from the unit. ... Show more .... blink 5 times (looks almost alike) If I forced the garage door closed, ...Missing: sequence

Sears Garage door opener problem - Home Forums > Home Forums > Garages/Workshops
Jun 27, 2006 - Now, I cannot get the light in the sensor at the door to come on. ... the green LED went OUT about 1/2 way up the door opening sequence. .... other is working (I don't recall if it's green or amber, but know that it is lit.) ... Their is also a green LEDflashing 2 times every 5 seconds or so at control center of unit.

Craftsman Garage Door Opener Problem - Home Forums

Jan 05, 2016 | Building Materials

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.

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).

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

1 Answer

Have a Craftsman 1/2hp garage door opener (HBW0777 year 1994). It won't close and goes back while blinking 8 or 9 times. Transmitting sensor (red light) is blinking 3 times (even i hold the two sensor...

Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. If the transmitting sensor light is blinking it is bad.

Nov 20, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

My red light sensor is blinking constantly and the green light sensor is steady. I grab hold of the red light sensor and squeeze and the light goes solid and I am able to close the garage door. when i let...

It sounds like there might be a loose wire connection on the inside of the sensor. You could also be moving the position of the sensor slightly into alignment when you squeeze the sensor. You will need to disconnect the wires for the sensor on the garage door opener or disconnect the power. Then use a flatblade screw driver and carefully seperate the sensor case. Check for any loose connections on the wiring(you might need to re-solder the wire to the sensor eye). It sounds like a loose wire connection to me.

Jan 09, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opener won't close. travels 6-8 in.,

If you cannot get the light on the sensor to come on by tweaking it,making sure it is pointed at the other sensor and your wiring is not broken or shorted then your sensors need to be replaced.

Jan 08, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door won't shut, light blinks 10 times.

If the light blinks 10 times it is a sensor problem. Nothing else will cause this. Tweak the sensor a bit and check it out.

Jun 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman GDO reverses itself when the door reaches the eyes

The only thing that will cause the main light to blink 10 times is a sensor problem. Sometimes the sensors will be misaligned just enough to turn the light on but will not work properly. If you look really close (on your knees) you can see the receiving sensor blinking ever so slightly. Tweak the sensors until the light glows constant.

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

1 Answer

Garage door opener.Working off and on. Green light blinking

Check the alignment of the safety light beams near the floor on each side of the door. They are not properly aimed and the safety reverse feature will not allow the door to close properly.

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

1 Answer

Chamberplain Garage Door Opener problem


Jan 25, 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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