Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Your lock on the opener is probably engauged. On the wall control there is a button labeled lock. Press and hold this button for three seconds. Your remotes should work now. If they still do not work, you need to reprogram the remotes. Press the learn button on the back of the motor and then press and hold the remote button. The light will blink once. Repeat this step on the other remotes.
Posted on Feb 26, 2009
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Posted on Jan 02, 2017
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COULD BE A BAD REMOTE, I WOULD TRY ANOTHER ONE FIRST.
COULD BE A FREEZER ETC. PUTTING OUT INTERFERENCE.
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
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