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

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Sears Garage Door opener lifts part way and stops. Connected to rail or not. Sensor circuits are working. I read that the RPM sensor would cause this if it's going down but this one is stopping while lifting.

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On the rear of the motor unit you will find the 'up force' adjustment. Increase this about 1/4 turn and try. It is also a good time to 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 it will be obvious if it is going bad. A bad RPM sensor will cause the door to stop when the door is opening and reverse to the open position when closing.

Posted on Mar 22, 2011

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Posted on Jan 02, 2017

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