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

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My garage door hums but does not open. It had

My garage door hums but does not open. It had been working fine until a day ago and now I hear the motor himming but nothing happens

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Sounds like you have a bad start capacitor. It sits next to the motor and is about the diameter of a silver dollar and about 5 inches long. You can get one at any good door opener service company.

Posted on Feb 06, 2010

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