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

1 Answer

Motor hums but nothing happens

I have checked the tension on the chain and it is not too tight. The door was sticking with extreme cold and my wife said that she was helping the door up by lifting it with the motor running but now it just does not work anymore. Some times it hums for a second, stops and humes again for a second and the stops with no movement. Other time it just keeps humming until it push the remote again to stop it. HELP

Posted by on

  • 1 more comment 
  • Anonymous Jan 10, 2009

    Exact same problem.....



    Thanks for any help you can give me.

  • Anonymous Jan 12, 2009

    Garage door doesn't work with remore and wall switch. Its trying to do something but won't open.

  • Anonymous Jan 13, 2009

    My problem is similar. I push the button and the door opens about 6 inches. Push again, it goes back down. Push a third time, it opens a little further. Eventually, it will open completely but there seems to be a lot of stress on the machine and the chain from this procedure.



    It gets worse the colder the temperature.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I just had the same problem. Extreme cold, garage door stops working, motor hums, same here. I opened up the my garage door opener(after unplugging it), and found that the wormwheel had a wear spot on it. This is the gear that allows the motor to raise and lower the garage door. Any way, after the wife "sugested" that the door was too heavy to lift, I went and bought a new garage door lifter. But if you are handy dandy with tools, I have seen the wormwheel for sale here. http://www.aaaremotes.com/gearsprocask.html It's the plastic wheel that went bad on me. If I would have found this before buying the garage door opener, I would have got the sprocket assembly. I hope this helps!

Posted on Jan 10, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Chain broke, I reconnected the chain, udjusted it so it was tight and now the short side is loose hanging low and the longer side from gear to gear is extremely tight, under tension. HOW DO I REMOVE THE...


Release the door from the opener by pulling down on the rope. It will be very hard to pull. This should release the tension on the chain but I think you need professional help with this opener. It sounds like it is badly out of adjustment. The chain coming off is an indication of a worn bearing that will have to be replaced.

Jun 06, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My 1/3 hp craftsmen door opener just hums when you hit the wall button or remotes in the car. I replaced the starter motor capacitor and nothing changed any ideas?


Is the door stuck in the open position? If so the trolley is probably jammed against the bolt just in front of the motor unit. Loosen the chain until the tension is removed from the trolley. Run the motor until the door is closed. While the door is closed locate the 'up limit' adjustment on the side of the motor unit and turn this 2 complete turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Dec 21, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

I have a Sears Crafstman Garage door wireless opener. Model 139.53615SR . The door hums but nothing happens. The chain doesn't move. The springs on the door broke last year and i replaced both of them....


My plastic gear stripped soon after a spring broke. I think the broken spring put a huge load on the opener that day and ruined the gear. Replacement wasn't too hard. It will be obvious when you remove the cover if the gear is stripped. Here are instructions:
http://tinyurl.com/gearfix
dwdfixya_1.jpg

Dec 19, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door will not open. The motor hums when I press the garage door button but nothing happens. If I remove the chain, the motor runs as normal and the gear rotates as normal. If I put the chain...


Check to ensure one or more of your garage door springs isn't broken (they last about 10 years). Most doors, especially double wides, have two or more springs. If one breaks, as they ultimately will, the motor won't have enough mechanical assistance from the spring to lift the door; however, gravity and one good spring will certainly close it.

Jan 04, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman garage door opener 1/2 hp will not open door


It sounds like your chain is out of sync with the limit switches. Loosen the chain enough so that you can remove it from the sprocket on top of the motor unit. Now run the opener until the sprocket runs counterclockwise and stops. Now with everything attached and the door in the open position replace and tighten the chain. You are now in sync. You may need to tweak the up and down limit controls which are on the side of the motor unit.

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

1 Answer

Chamberlin Liftmaster 2245 won't open or close, just hums


If your door is stuck in the open position you need to see if the trolley is jammed against the bolt just in front of the motor unit. If it is, loosen the chain enough to remove the tension from the trolley. Run the motor until the door closes and then locate the 'up limit' on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Apr 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Lift-master chain drive garage door stuck at the protection bolt


you will have to find were the chain is binding look around the drive sprocket and check the chain to see if it is tight at the bottom or top this will tell you were to start looking for the problem.

Sep 19, 2008 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

Garage door drive stuck un up position


I found the chain extremely tight on the sproket. The mechanism had stalled hard against the stop bolt. I loosened the chain tensioner and the motor operated properly. Reset the limit adjustment so the mechanism stops a couple of inches from the stop bolt. Door is working fine now.

Jan 23, 2008 | Sears Craftsman LiftMaster Chamberlain...

Not finding what you are looking for?
Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ Logo

1,047 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sears Garage Doors Experts

Al Clark

Level 2 Expert

290 Answers

Cindy Wells

Level 3 Expert

4757 Answers

Pieter Vleeshouwers

Level 3 Expert

1413 Answers

Are you a Sears Garage Door Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...