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

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Chamberplain Garage Door Opener problem

My garage door open by wireless remote but not close. if I push remote button to close , ony light blinking several time. If I use keypad on wall, I have to 4 digit password and hold the enter button until completely door open or close. Also, when I use keypad, same problem, push password and enter, garage door opener light blinking several times and not close door and push enter one more time, door will be closed. of course, I have to hold button until it completly close down. I don't know what happen, it occured suddenly. Please help how can fix it.

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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

Posted on Jan 25, 2009

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How to change code on the garage door opener and the remote control on a lift master garage door opener


If you have a 315MHZ LiftMaster Garage door opener do the following:
Follow the purple wire (Antenna) up and you will see a square purple button.
Press and hold the square purple button for ten seconds until the amber led goes out.
Press and release the purple button one time (The amber led will come on solid).
Press and hold the button on the garage door opener remote control for two seconds (The light bulb on the garage door opener will blink and you will hear a click sound the amber led will go off).
to program the wireless keypad do the following:
Press and release the purple button one time (The amber led will come on solid).
Enter a four digit code into the keypad then press and hold the enter button for two seconds (The light bulb on the garage door opener will blink and you will hear a click sound the amber led will go off).

Aug 08, 2014 | liftmaster Lift Master 377LM 376LM 315 MHz...

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

Craftsman Model 139.53684 Security+ Keyless Entry Garage Door Opener... Green light flashing on door control push button. Remotes no longer work. Can open and close garage door from keypad. Why is light...


To answer your question the opener is in vacation mode. Press and hold for 3 seconds the button on your wall control with the lock icon. The green light will stop flashing and you will be back in business.

Dec 08, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door wont work with remote


If the small light in your wall control is blinking it is in the lock mode. Press and hold for 3 seconds the button with the icon of a lock. This will toggle the lock function off.

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

1 Answer

Have to hold the push button inside my garage to close garage.


You have a door sensor problem. Make sure the sensors are pointed at one another and the small light on each one is lit and not blinking. Also check the wiring.

Jul 19, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door remote does not open door


I think you'll need to reset the wireless connection. Try pushing the button on the machine, then something on the pad. (or vise versa)

May 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Remote not working


you will need to train (link) the remote to the garage door opener. to do this you will need to find the remote "train" button on the operator.
If you have the manual for the garge door opener this will show you where it is located.
push the train button on the operator, an LED light will start blinking. Then push one of the buttons on the remote. the LED light on the operator will stay on. push the button on the remote again and the light on the operator will turn off.
try the remote it should work now.

Apr 05, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opens on it own and light blinks


  • Stuck remote control button. Check all remotes. check LED on receiver.
  • Staples around Multi-Function Control Panel bell wire could be cutting into that wire. Remove wires from opener and test. Replace staples causing intermittent short.
  • Multi-Function Control Panel could have sticking door control push bar. Remove wires from control panel and test. Replace control panel if defective.

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