Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ Logo
Posted on Jul 05, 2011
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Model 139.53684 keypad buttons flash when i type in my 4 digit code, door does no operate. our two car remotes do not work either now (i put new batteries in those also). the wall button, inside the garage/hardwired, works to operate the door, but the other two methods do not. I did put in a new battery. Hopefully that info will help you assess my problem. Thank you, Dave

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  • Posted on Jul 05, 2011
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The receiver has quit which is part of the logic board. The wall control still works because it is hardwired and doesn't use the receiver.

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How do I change the code on garage door opener craftsman 139-53975srt1

If this is for the wireless remote control, press the learn button on the opener and then hold the button on the remote.

If you would like to chance the code on a wireless keypad, press the learn button on the opener, type the new 4 digit code on the keypad, and hold the "enter" button on the keypad until the lights flash.
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Tried to reprogram security code for outdoor key pad on 1/2hp craftsman garage door opener according to instructions online, pressed learn button- put in new 4 digit code-held enter. Lights did not flash...

Seems you've done everything right. Press and immediately release the smart/learn button and then walk over and key in a 4 digit code and press enter. If you are sure the battery in the keypad is good then I think your keypad is on the fritz or the wrong one for that opener.
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I don't know this model. (in australia). the chamberlains here are probably the same. the 4 digit code you first put in the keypad is what you have to use. push the learn button on your operator then punch in your 4 digit No. Hold the enter button on your keypad until the light flashes on the operator.
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How do you clear and re-enter a new code for wall mounted remote

To change the code you need to locate the smart/learn button which is near where all those white wires go. Press and immediately release it and then walk over to your keypad and key in any 4 digit code you like and press enter.

See if this works for your car.

  1. 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 auxillary, and/or the car door must be shut).
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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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I programmed 2 new remotes with no issue but, cannot get the remote keypad to reprogram (we just bought the home and don't know the existing code) the model for the garage door opener is Chamberlain...

Your keypad may be bad. If you press and immediately release the smart/learn button and then key in your 4 digit code and press enter the keypad should be working. Be sure you have a good battery. Actually the flashing of the keypad is indicating that it is sending the signal to the receiver. Holding the enter button in doesn't do anything extra.
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