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

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Craftsman Garage door opener not working

Neither the remotes or the hardwired opener will open the door. Checked the sensors, they align, there is a green flashing light on the actual unit. When you push the opener, the unit just hums for two seconds and the green light flashes on the unit. I tried resetting the unit by pushing the green reset button by the green light. I also held down the opener button, it still does not work. Any ideas?

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First, check the springs in the actual door to make sure that they are not broke. Since you held the learn button down to reset the opener, you have to reprogram all of your remotes. This button only resets the remotes. It has nothing to do with the rest of the opener. To reset the opener, simply unplug it for a couple of minutes and then plug back in. Pull the handle on the door and see if you can operate the door manually with one hand. If it takes more than 15lbs to move the door, there is a problem with the door balance. If the springs are not broke and the door operates smoothly, the likely cause is the rpm sensor on the opener.

Posted on Feb 17, 2009

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Are the sensor lights located on each side of the garage door opening? Have you checked to see if they are in alignment with each other? Also check to see that any wire from the sensors are disconnected on the motor or at the sensor itself. Good Luck! Countrycurt0

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