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

4 Answers

Garage door only works partly

The button in the garage when pressed once will open the door but not close it. Only if I hold the button inside the garage until the door is completely down does it actually close the door. Remote control can only open the garage door.

If I use the remote or simply press the button inside the garage the door goes up and the light blinks.

I have tried adjusting the force but it didnt fix the problem.

Any ideas would be great. Thanks in advance.

Craftsman Model 139.53927

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  • esardarsingh Feb 19, 2009

    I have two garage doors with the same unit 1/3 HP. The recieving sensor stays off, the transmitting sensor stays amber. Using the working door opener, I was able to check that the sensors are good, sensor wires are good. If I remove the sensor wires at the head unit and reconnect the wires, the green LD will flash once and stay off. I'm thinking the main board is bad.

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If sensors are aligned, then you may have a broken wire or a shorted wire on the sensor wiring running to the opener. try jumping the terminals on the opener(which disables the sensors) and see if everything works. if it does, then you have a wiring issue.

Posted on Sep 23, 2015

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Sometimes my garage door clicker does the same thing, partially opening my garage door. I looked everywhere trying to see if something was jamming the tracks or blocking the sensors but there was nothing there. So I just had the clicker reprogrammed to the garage door and it seems to be working fine now. I hope that helps answer your question .
http://www.mikesgaragedoors.ca/

Posted on Sep 15, 2015

  • rdjagger Sep 16, 2015

    it is a sensor alignment issue, or a broken wire, or a loose connection. classic sensor issue. holding in wall button will close door when sensor circuit is not completed.

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Look at your sensors there is a light on each one by the wing nut. one should be amber and the other one is green make sure they are aligned. The amber one will always be on as long as it has power to it.

Posted on Jan 28, 2015

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Some thing blocking sensor or laser is not in proper alinement

Posted on Feb 18, 2009

  • Josh Allen
    Josh Allen Sep 16, 2015

    Thanks I will try that

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The problem could be with the travel or force adjustments. However, more likely, the door is binding during travel or the garage door opener gears are damaged. Disconnect the door from the opener and check how it opens and closes. Is the door binding anywhere? Check if the rails are bent or if the framing of the door has rotted at the bottom. (We had one garage door where the door jamb was damaged. This led to the doorway shrinking and the door jamming.) If you open the door part-way, does it stay at that position? Do this test carefully; you may get injured if the door falls. If it doesn't stay open, then the torsion spring tension may need off or the springs need to be replaced. If the springs are mounted next to the doorway, you need a professional to check the springs. (If the torsion springs are further from the door, you may want a professional to check them. You will need to use vise grips or a similar tool to keep the door partway up and prevent it from falling when you adjust the tension. You will need to adjust both sides evenly.)

When you press and release the garage door opener button, how far does the door travel? Do the opener lights blink three times? Are both obstruction sensor (often green and amber) lights lit? Please add a comment with more information about the symptoms for additional help.

I hope this helps.

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