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

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Intermittent problem w/Sears garage door opener transmitter

Every few days my Sears garage door opener transmitter working. The wall push button flashes indicating loss of code. I can reset the transmitter code using the SRT code button on the back of the unit, no problem. But then I have to do it all over again in a few days - annoying! Is there any reasonable fix for this or must I (continue to) live with it? Thanks.

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  • dickkit Feb 26, 2009

    Thanks, I am already able to reset everything. Problem is, It keeps happening over and over and over...

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If the wall control is flashing, the lock has been engauged. Hold the lock button for 3 seconds to turn off. The light should be solid after doing this.

Posted on Feb 26, 2009

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Trying to clear the codes from my Garage Door opener. 41A3615, 139.53615SR, Grey Learn Button, '92 mfg date. I added a Klick universal wireless wall pad and a Klick universal remote and now my neighbor's...


In most cases, when a garage door opens or closes by itself, or when you find your door open, upon returning home, the problem is due to a short somewhere. This short is most likely to be in one of two places: either in one of your transmitters or in the wall button or its wiring.
When there is a short in your garage door transmitter, you will often find the garage door is up upon returning home, even though you know you closed the door when you left the house. A short in your transmitter causes a continues signal to be sent. As you are pulling out of the driveway the garage door closes fully and appears to stop, but as the carriage and arm run past the down limit and hits the header bracket it reverses, and the door begins to open, just as you start driving off down the road. You come home to find the garage door is up, as if someone else had opened your door. The best thing to do to troubleshoot the garage door problem is remove the batteries from your transmitters and try operating the door from the wall button. If the problem is intermittent, you may want to do this for a day or two to eliminate the transmitters as the culprit.
If the problem persists, try removing the wall button wire at the motor head to ensure it is not a short in the wire to the button, then try operating the garage door with the transmitters only. If it stops the problem, replace the wires and test the wall button. It is a process of elimination.


Mar 29, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

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).
  2. 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.



Feb 02, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opens whenever it wants to


In most cases, when a garage door opens or closes by itself, or when you find your door open, up returning home, the problem is due to a short somewhere. This short is most likely to be in one of two places: either in one of your transmitters or in the wall button or its wiring.

When there is a short in your garage door transmitter, you will often find the garage door is up upon returning home, even though you know you closed the door when you left the house. A short in your transmitter causes ta continuous signal to be sent. As you are pulling out of the driveway the garage door closes fully and appears to stop, but as the carriage and arm run past the down limit and hits the header bracket it reverses and the door begins to open, just as you start driving off down the road. You come home to find the garage door is up, as if someone else had opened your door. The best thing to do to troubleshoot the garage door problem is remove the batteries from your transmitters and try operating the door from the wall button. If the problem is intermittent, you may want to do this for a day or two to eliminate the transmitters as the culprit.

If the problem persists, try removing the wall button wire at the motor head to ensure it is not a short in the wire to the button, then try operating the garage door with the transmitters only. If it stops the problem, replace the wires and test the wall button which can also go bad. It is a process of elimination.

Oct 05, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Liftmaster pro garage door opener opens randomly


CHECK FOR REMOTE CONTROL DAMAGED OR WALL CONTROL SHORTED WIRE

Apr 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opens on its own


u have to erase all memories in the receiver.. push the learn button for like 10 sec.... and memorize again ur transmitter by presing the learn button once and the the transmitter button... try it again..

Mar 09, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Garage door opener transmitter/receiver compatibility


Press and hold the homelink button and wait till the red light flashes slowly,but don't release it. Now hold a working remote 3 inches away,press the remote button and hold it.When the red Homelink buttom fllashes quickly, release both buttons. Now go to the opener and push the learn button. Now go back to your car and press and hold the Homelink button. You will see the lights on your opener flash. Now your Homelink button should operate your garage door.

Jan 29, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Transmitter not working ( 3 of them)


don't hold down green button. push for one second. do yu have console with vacation or lock button. deactivate it.

Dec 27, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

All garage door transmitter would not work


The lock is probably engaged. Look at the wall button, the green light is probably flashing. Hold down the lock button for 3 seconds and light should be solid. Your remotes should work now

Oct 24, 2008 | Sears Craftsman LiftMaster Chamberlain...

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