Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Genie garage door will start going up and down by itself, thought it was the Genie but changed the 9volt battery in the Chamberlain outside key pad (which is inside the garage) and problem quit. But the new battery will last only a week and opener starts to go up and down again. Changing the battery solves this problem, but, battery only last about a week and problem starts again until I put another new 9 volt battery in the unit. Why?
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.
HOPE THIS HELPS
Posted on May 30, 2010
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Posted on Jan 02, 2017
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Clear out anything previously
programmed into the in-car system from the factory by holding down
on the 2-outside buttons simultaneously, until the in-car LED starts
flashing rapidly. This may take up to a minute (in most cases, the
key should be on auxilary, and/or the car door must be shut).
Decide which button you want to
make to be your in-car garage door transmitter. Hold your
transmitter up near the selected button, pressing both the garage
door remote and the selected in-car transmitter button
simultaneously. Hold down on the buttons until the in-car, LED light
flashes rapidly. This sets the in-car remote transmitter to be your
garage door openers make transmitter, but you are not done. You now
need to make this in-car transmitter your personal transmitter.
3. Go to the
Learn Button on your garage door opener. The button is usually next
to the area where the floppy antenna is connected to the motor head.
With Genie it is most often behind the light lens, and an indicator
light flashes red when pressed. With Sears or Liftmaster
(Chamberlain) it is near, or part of, the terminal screw board, and
is a red, green or purple square button with a green, amber or
purple indicator light. Press this learn button momentarily. The
indicator light will turn on and blink if Genie or otherwise stay
lit. For Genie systems, go back to the in-car transmitter button you
programmed and press this button 3 or 4 times, or until the door
starts moving. This should set your in-car transmitter to your
garage door opener. For Liftmaster, Sears, or Linear Megacode press
and hold the in-car button you programmed until the garage opener
light flashes. Your in-car is now programmed to operate your door.
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