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

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Door only goes up a little to half way up on its own. If you help push it, it will go the rest. What can I do?

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You can increase the 'up force' which is a control on the rear of the motor unit near where all those white wires go. You should also remove the cover from the motor unit and check the drive gear. It is a white nylon gear just in front of the motor and may be going bad. If it is it will be obvious.

Posted on May 17, 2010


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My drivers side window only goes half way down then i need to push it to help an then it only goes a little way an i need pull it till it catches an at the top it grinds as if it could keep going

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