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

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My garage door will only open half way. It appears to be getting stuck when it is opening.

THe garage door will open and close with the remote control, but it will only open half way and it stops.

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If you haven't gotten your issue fixed yet... I had the same problem (stopped opening half way when using the remote, went down fine, could lift/close manually fine as well) and this happened on our first cold weather day of the year which was very telling. Anyhow, there are two gauges/dials on your garage door opener unit itself (above, where the light is) which controls how much torque/strength your door uses to open or shut through resistance. I turned mine up some and it now works fine; what likely happened was that the metal tracks or the wood frame condensed in the cold and was providing just enough resistance to stop it when opening - as they have a security device built in to stop if they meet any resistance. Hopefully this helps!

Posted on Oct 29, 2012

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Posted on Jan 02, 2017

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  • 3197 Answers

SOURCE: Door will not close with remote.

The code you are seeing with 5 blinks is "RPM sensor or motor overload." We can eliminate the motor overload because the door is trying to close. The RPM sensor is a small printed circuit board just in front of the motor. It's a snap to replace and is available at any good door opener company. They will know exactly what you are talking about if you ask for an RPM sensor board.

Posted on Aug 26, 2009

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SOURCE: Remote Control closes garage door but does not open

It sounds like a case of your keypad losing signal strength enough that it cannot transmit through the closed door. If a new battery doesn't do the job a new keypad will.

Posted on Sep 12, 2009

  • 3197 Answers

SOURCE: Remote control for garage door suddenly stopped working.

Press and hold for 3 seconds the button on the wall control with the lock icon. There you go.

Posted on Nov 21, 2009

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SOURCE: Craftsman Model 139.53684 Security+ Keyless Entry

To answer your question the opener is in vacation mode. Press and hold for 3 seconds the button on your wall control with the lock icon. The green light will stop flashing and you will be back in business.

Posted on Dec 08, 2009

  • 3197 Answers

SOURCE: garage door is stuck half way up - opener still running

Sounds like your drive gear is bad. It is a white nylon gear just in front of the motor. It will be obvious.

Posted on Dec 30, 2009

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1 Answer

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With the garage door up pull the release cord to disingage the garage door it self in the up position. You can skip the disengaging step, But,It saves ware and tear on the motor.

Then using a step stool you will find limit adjusting plastic slots/screws on the side of the opener.

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I would turn the left screw clockwise 1/2 turn or less. then activate the remote opener. noting which way the latching mechanism moved. and so on.

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This indicates that the nylon gears in the unit have been stripped and need replaced. You can get new ones at searspartsdirect.com. Enter in your model number and a parts list will come up. Thanks BB

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