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

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No response from opener when pushing the button from the garage wall button. do get a hum, no response.

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Make sure the trolley is not jammed against the bolt just in front of the motor unit.

Posted on Aug 04, 2010

  • mfl1126 Aug 04, 2010

    This is what I did earlier today. Took off the housing over the belt and it worked.
    Thanks.

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1 Answer

Why doesn't the door move when i press the wall button it just hums?


Anthony, Since It's humming you know it's getting juice. It could be the the same exact problem I had on our Sears Liftmaster. First remove the cover and check the set of nylon gears to see if they try to move when you push the button. If so, the motor is probably ok.
The gears operate off a worm drive and come as a set, and sometimes they jam or are worn out. If the motor runs after pulling the gearset it's good. Go to Chamberlain for the parts. They're cheaper and faster than Sears. If want a diagram, for that model google one form their website and you can see how to take it apart. Ken

Feb 04, 2015 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Garage door opener won't work


Motor has overheated; the motor unit does not operate or trolleyis stuck on stop bolt = Motor unit hums briefly; RPM Sensor =Short travel 6-8" (15-20 cm).• Unplug unit to reset. Try to operate motor unit, check diagnostic code.• If it is still flashing 5 times and motor unit moves 6-8" (15-20 cm), replace RPMsensor.• If motor unit doesn't operate, motor unit is overheated. Wait 30 minutes andretry. If motor unit still will not operate replace logic board.

Aug 30, 2012 | Craftsman 3/4 Hp Garage Door Opener System...

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

LiftMaster garage door opener won't open. When push button (from either remote or "door-bell" style button on wall), unit makes a slight humming sound for a couple of seconds, then nothing...?


Check the door springs and also the drive gear. The gear is a white nylon gear just in front of the motor unit. It will be pretty obvious if it is going bad. The door spring may be broken.

Oct 23, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door does not open or close


You have a stripped drive gear. Remove the cover from the motor unit and you will find white sawdust all over. The part number for the gear kit is 41A2817 and is available at any good door opener service company. It comes with instructions.

Feb 12, 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

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

Craftsman Garage Door Opener won't work after storm


Check to see if the trolley (the part that slides back and forth on the rail and is connected to the door) is jammed against the bolt just in front of the motor unit. If so, remove the bolt and run the door until it is closed. On the side of the motor unit there is an 'up limit' control. Turn this 3 turns in the opposite direction of the arrow printed on the cover. Be sure to replace the bolt.

Jun 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Remotes wont close door


IF THE DOOR WORKS NORMALLY FROM THE WALL BUTTON AND YOU GET NO RESPONSE FROM THE REMOTES (NO CLICK ETC.) THE LOCK BUTTON HAS PROBABLY BEEN PUSHED.

SEE IF THE LED BEHIND THE BUTTON IS FLASHING IF IT IS THE VACATION LOCK HAS BEEN ACTIVATED - PUSH THE BUTTON MARKED LOCK AND ALL SHOULD BE WELL

HOPE THIS IS HELPFUL

Dec 16, 2008 | Sears Craftsman LiftMaster Chamberlain...

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