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

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Wall opener blinks but will open & close door.

Wall opener blinks . car unit will not operate the opener. It blinks at the green eye on the opener but will not open. This all happened when I struck the wall unit more than once because it would not move. The unit works when I touch the wall control but stills blinks. I pulled the power to let the opener cool down.

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Press and hold for 3 seconds the lock button on the wall control.

Posted on Dec 12, 2009

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How to get my garage door to open all the way?


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).

Jun 15, 2014 | liftmaster Garage Door 1/2 Hp

2 Answers

The light on the Garage door 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).

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

1 Answer

Green senor light blinks on and off. Can only open garage from wall opener . There is no senor blockage.


WHAT GREEN SENSOR LIGHT ARE YOU REFERING TO.

IF YOU MEAN THE WALL BUTTON LIGHT - THAT WOULD TELL YOU THET THE LOCK BUTTON IS ACTIVATED LOCKING OUT ALL RADIO CONTROLS - PRESS & HOLD THE LOCK BUTTON FOR 3 SECONDS THAT WILL TURN OFF THE LOCK FEATURE - PROBLEM SOLVED.

IF YOU MEAN THE GREEN LIGHT ON THE SAFETY EYE - CHECK THE WIRING IT COULD BE A BROKEN WIRE OR REVERSED POLARITY - ALSO BE SURE THE UNITS ARE PROPERLY AIMED AT EACH OTHER.

HOPE THIS HELPS

Nov 09, 2010 | liftmaster Chamberlain Garage Door Opener...

3 Answers

I have a craftsman garage door opener and I have to hold the button down in order to close the door. The door opens fine and the sensors are clear. The unit starts to close then stops, the lights start...


When you can close the door by holding down the wall button it IS the safety eyes or wiring.

If the eyes are mounted to the track. Many times the track wll move as the door closes causing the eyes to move out of alignment.
Watch as the door moves down and see if they need to be adjusted.

If the eyes are not both lit - they are out of alignemnt or have a wiring problem. try adjusting them and see if the lights come on. - if not check the wiring

Hope this helps

Jul 12, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Pressing remotes the door won't go u[


It sounds like you have the lock enguaged. When it is flashing it locks out all remote access. Hold the lock button for 3 seconds. The green light should go solid. On the issue of closing, it is most likely a safety eye issue. Hold down the wall button. If it closes it is the safety eyes. Holding the button overrides the safety eyes. Make sure that thelight on both eyes are both lit.

Jan 27, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberplain Garage Door Opener problem


IF U HAVE TWO EYE,SENSORS ON EACH SIDE OF THE DOOR SEE IF SOMETHING IS BLOCKING THE EYES OR SOETHING IS COVERING THEM, OR THEY ARE OUT OF ALIGNMENT, ONE SHOULD SHOW GREEN, AND ONE RED EYE, GOOD LOCK

Jan 25, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door Opener Lights


Some craftman operator don't have that feature. Are both photo eye lights green? Feature not available. If the photo eyes are yellow and green feature should be avilable. The operator needs to have a three button wall station. With the light on the operator off press and hold the "light" button for about a minute until the light flashes.

Jan 11, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain Liftmaster Pro. Garage door Problems closing


The sensor eye - or more likely, the other end, the sensor light - probably got knocked out of alignment. The eye should have an LED on it - possibly one that glows green when it's ready to close or red when it's obstructed or out of alignment. Try adjusting the light until the LED on the receiver glows green.

Dec 07, 2008 | Sears Craftsman LiftMaster Chamberlain...

14 Answers

Sears craftsman 1/2 hp garage door troubleshooting


My garage door opener will start to close then stop and go back to the open position. If I put pressure on the door as it is closing sometimes it will close all the way and sometimes it will return to the open position. Can you help me. Thanks pbstation771@verizon.net

Aug 18, 2008 | Sears Craftsman LiftMaster Chamberlain...

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