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

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Keypad does not work when I just change a new battery, no light

I just change a new battery on keypad which mounted outside of garage. when I put password on it, no light and nothing happen.

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Make sure the battery is good. anytime you change the battery you need to reprogram the keypad.

Press and release the square button on the circuit board. You then have 20 seconds to input the desired code and press enter.


Hope this helps

Posted on Oct 04, 2010

  • Myriam Tueni
    Myriam Tueni Dec 11, 2014

    Can u please tell me how you changed the battery on the keypad ? I cannot open the keypad in order to change the battery :( thanks

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Anytime a door opens and/or closes randomly or doesn’t work consistently I look for a smashed wire between the motor unit and the wall button.

If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door or interfere with the remote signal.

Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.

The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.

The test is to disconnect the push button wires at the power unit. If the self operation / interference stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.

In your case the expansion of the wall in the afternoon may be enough to cause pressure on the wire to increase the problem – works in the morning but not the afternoon.

Also after you change the batteries you need to reprogram the remotes.

HOPE THIS HELPS

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