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

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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

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  • 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.

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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

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