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

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The light on the hard-wired switch in the garage flashes green instead of being a solid green. When it is flashing none of the wireless remotes work either.

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

Posted on Oct 14, 2010

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1 Answer

I have a Sears Garage door opener (139.53800SRT)was working and then just quit working. None of the remotes or wall switch work. When I press a switch I hear a few click in the opener and then nothing. ...


The code for 5 flashes is " Motor overheated or possible RPM sensor failure. Unplug to reset." Also if the door is stuck in the open position it could be the trolley is jammed against the bolt just in front of the motor unit.

Feb 07, 2010 | Sears Craftsman LiftMaster Chamberlain...

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Sear garage door wall mount contol light keeps blinking


Hold the button with the lock icon in for 3 seconds. This should toggle the unit off vacation mode and your remotes will work.

May 31, 2009 | Sears Craftsman LiftMaster Chamberlain...

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


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

Dec 30, 2008 | Sears Craftsman LiftMaster Chamberlain...

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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...

1 Answer

OLDER SEARS GARAGE DOOR OPENER WONT OPEN GREEN LIGHT FLASHING


do you have the sensors at the bottom of the door? if so they might be out of alignment. all you have to do line them up by getting the green light solid. let me know if this helps you.

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

1 Answer

All garage door transmitter would not work


The lock is probably engaged. Look at the wall button, the green light is probably flashing. Hold down the lock button for 3 seconds and light should be solid. Your remotes should work now

Oct 24, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The remote opener reset button goes off and will not work


The green button is not a reset it is the program button.

If you hold the button down for about 20 seconds it will erase all codes. Then, press and release the button - press and hold the button on your remote for about 10 seconds. the next time you press it it should activate the door. Repeat the 2nd step for all additional remotes.

The lock button on the wall control locks out all radio signals for vacations etc.

If the lock has been activated the green led in the wall control will flash - when the lock is deactivated the led stays solid green.

Hope this helps

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

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