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

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Anonymous Posted on Nov 30, 2010

What would cause the door to not always open or starts to open and then recloses? Thank you

1 Answer

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  • Master 3,197 Answers
  • Posted on Nov 30, 2010
Anonymous
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A broken door spring or a bad drive gear could cause this problem. The drive gear is a white nylon gear just in front of the motor and it will be obvious if it is bad.

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Send me the model number and I can send you the schematics!

Thank You for trusting us with your questions.
Huum
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sounds like transmission not resetting for spin properly replace transmission
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