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

1 Answer

Garage door opener will not work up or down,light is on.

Lock out light flashes and there is power to the unit but no sound or action when you push the button-door mount or remote.tried holding green button down till light went out but came back flashing a couple seconds later.

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  • ecarns Jan 15, 2009

    I went to a Sears store and a group of 4 salespersons agreed that I probably need a new moter board,that it may have been hit with a power surge created by lightning.We did have lightning in the area about the time it quit working.

  • Joseph Chapman
    Joseph Chapman May 11, 2010

    Try unplugging the operator for 2 minutes and plugging it back in and see if that works.


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  • 244 Answers

Take off console )disconnect wires). if remote works, get new console.

Posted on Jan 15, 2009

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1 Answer

What does the purple button light flashing on 1/2 horsepower craftsman garage door opener


I think the adjustment mode is on.

For example, that's from Craftsman manual:

""
Setting the Force
The force setting button is located on the left panel of the motor unit. The force setting measures the amount of force required to open and close the door.
1. Locate the purple button on the left panel of the motor unit (Figure 1).
2. Push the purple button twice to enter the opener into Force Adjustment Mode (Figure 2). The LED (Indicator Light) will flash quickly.
3. Push the remote control or control console (Figure 3). The door will travel to the DOWN (close) position.

""

Actually, you should just read carefully your garage door opener unit's manual.

Craftsman Garage Door Opener Remote

Jun 21, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Chamberlain Liftmaster Formula 1 garage door (2002) has stopped working. The power is on -- light turns on when I push the wall mount button. But the remotes no longer work. The door does not move. ...


The light by the learn button may be sending a diagnostic code. See if it is flashing a number of times, pausing and then repeating. Count the flashes. Is your door stuck in the open posititon?

Jun 11, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have the same problem that is listed above with my 1/2 horse power belt drive garage door opener. The lights on the sensors are both green and the alignment works, the overhead light will turn on if the...


Sounds like you have a couple problems. The opener is in the lock mode which is the reason the remotes will not work. Press and hold for 3 seconds the button on the wall control that has the icon of a padlock on it. This will unlock the opener and your remotes will work. If when you try to close the door the main light flashes 10 times when the door reverses to the open position it is a door sensor problem. One of the small lights on the sensor may be flickering ever so slightly. Tweak them a bit and try. If this isn't the case and the main light is not flashing you can try increasing the down force just a tad. This control is on the rear of the motor unit near where all those white wires go. Increase this just a bit and try. If this doesn't work you most likely have a bad RPM sensor board which is a small printed circuit board just in front of the motor. It will cause this problem.

Dec 15, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain Liftmaster GDO just clicks, no lights no open/close


Pull the logic board and check it for burnt or missing traces on the printed circuit. Thunderstorms love logic boards.

Apr 25, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door opened but will not close. I opened


I think the trolley has jammed against the bolt just in front of the motor unit. Remove the bolt and then run the door until it is closed. With the door closed locate the 'up limit' control on the side of the motor unit. Turn this 2 turns in the opposite direction of the arrow printed on the cover. Replace the bolt.

Sep 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman GDO - Remotes not working


I think this is an easier way to program. Press and hold the button on the remote and then press and immediately release the smart/learn button on the rear of the motor unit. Do this for each remote you have.

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

2 Answers

Garage door only opens with wall unit


a component in the wall unit is failing , that makes the conection happen when the remote signal is recieved , ( it is recieving the remote signal but not sending it out to the control circuit for the motor )

Dec 29, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door only opens with wall unitq


The unit is in the lock mode, push and hold the lock button in for about two seconds and the green LED should stop flashing. Your remotes should work.

Dec 29, 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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