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

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Garage door doesn't close properly

The garage door starts to close but then backs off as if the sensor is tripped. This consistently happens every time the door closes at a certain point (approximately 1 foot from the bottom and no there is nothing protruding from the door that is tripping the sensor). This inconsistently happens at various other points along the path.

the sensors are clean. I cannot tell if they are pointed directly at one another, but they are very firmly in place. This problem just started happening recently. Opener is about 9 years old now.

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  • Anonymous Jan 03, 2008

    the garage door starts to close but then backs off as if the sensor is tripped. This consistently happens every time the door closes at a certain point (approximately 1 foot from the bottom and no there is nothing protruding from the door that is tripping the sensor). This inconsistently happens at various other points along the path.

  • Anonymous Jan 03, 2008

    when I press the control inside the garage the door will start to move then the light flashes on motor and garage door will not go down unless I manually hold control down inside garage, also keypad will not open the door.

  • Anonymous Jan 05, 2008

    yeah I have the same problem with mine. It's just started to become a pain to open and close recently. Nothing is blocking the sensors, yet it stops at various points along the way as if something were. Once closed, it only opens a foot or so and then stops. So I see as not a sensor problem because sensors only affect the closing process. It's all so annoying, especially where it is so cold outside and I want to keep the car in the garage!

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I just had this problem and I cleaned the sensors and made sure all the lights on the sensors were on. They were but yet the propblem persisted.

I checked all the wires and found that the wires were touching where they went into the unit. I separated them and all is working fine now.

Posted on Aug 12, 2009

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Have you adjusted your sensitivity regulator screw found on the motor box? I had the same issue. Would open only so far and then would do an auto open once it closed so far. Adjusted the 2 screws (*One* for the Upward Motion *Second* for Downward motion) and this did resolve the issue...Good luck!

Posted on Mar 07, 2009

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For the guy who has the problem with the sensor acting like it is tripping try this.If a wire on one of the sensors is not connecting well, it will make the light on the sensor go off, the sensor that is operating won't recognize the other sensor which can cause it to think there is something blocking it. Try jiggling the wire on each one to make sure the wire is getting good connection. You will see the light on the sensor blink off and on if its doing this. The light on the sensor has to stay on for it to be working properly. Ive seen this happen twice in the last year and I dont work on them for a living:) good luck

Posted on Jan 08, 2008

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