20 Most Recent Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ Questions & Answers

Can you explain what it is you are trying to do and who makes the opener?

Sears Craftsman... | Answered on Apr 01, 2020

The button should be on the back of the motor unit. You may have to remove a light lens to find it.

Sears Craftsman... | Answered on Mar 26, 2020

How can I find out the correct settings for this blue relay?

Sears Craftsman... | Answered on Mar 08, 2020

Good Morning:

I also substituted Floescent Bulbs for the standard bulbs. The bulbs would not light up although the relay was working. It seemed that the Florescent bulbs had a somewhat shorter neck. What I did was unplug the drive system from the outlet and then bend the metal connector in the socket so that it would come out further towards the opening of the socket. I then repluged the drive. The Floercent bulbs now have contact and are working perfectly. Simple problem with a simple solution.


Sears Craftsman... | Answered on Oct 09, 2019

The door is making a hard stop before the motor cuts off, causing the slack. Minor adjustment should cure the problem.

Sears Craftsman... | Answered on Aug 16, 2019

This is the most difficult question to answer because technologies and frequencies have changed and there is not a good way to check. If you program the opener to this remote and your other remotes quit working or if it will not program at all then you know the answer.

Sears Craftsman... | Answered on Jul 16, 2019

They have changed the radio frequency and the two will not work with each other.

Sears Craftsman... | Answered on Jul 16, 2019

The radio frequency has been changed so the two are not compatible.

Sears Craftsman... | Answered on Jul 16, 2019

The keypad listed for your model is 53876. If this is the keypad you presently have and the remote no longer works after you program the keypad it could be the remote that is bad. Sounds strange but it is true. Make sure you are programming the keypad like this.

Locate the smart/learn button on the rear of the motor unit near where all those white wires go. Press and immediately release this and then walk over to the keypad and key in any 4 digit code you like and press enter.

Sears Craftsman... | Answered on Jul 16, 2019

The remote you got is billion code technology and will not work with your opener.

Sears Craftsman... | Answered on Jul 16, 2019

You got the wrong keypad for your opener. Be careful who you buy from.

Sears Craftsman... | Answered on Jul 16, 2019

To have your lights come on automatically when you walk into an open garage you must START with the lights ON. To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash.

Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.

To disable this feature, start with the light bulbs OFF and everything else is the same.

Sears Craftsman... | Answered on Jun 14, 2019

I had the same problem. Although it appeared to be the logic board, on mine it actually was the connectors between the logic board and the power supply board.
There are 2 connections on the logic board. One white connector with wires going to the main unit, and another set of connectors that plug directly into the smaller circuit board that holds the step-down transformer (120vac - 22vac). These pins were not making good connection between the boards. I simply bent the pins slightly so they would make better contact on the logic board and have not had a problem since. This must be a weak point on these door openers. Purchasing a new logic board would work too, as the connectors are newer and tighter.

Sears Craftsman... | Answered on May 28, 2019

Check your home circuit breakers.

Sears Craftsman... | Answered on Mar 08, 2019

From Chamberlain's website:

There are a few different things that can cause this type of problem.
  1. Look at the LED light next to the SMART/LEARN button on the motor unit. If you are facing the garage door, the SMART/LEARN button is located on the rear end or right hand side panel of the motor unit. You may need to remove a light lens cover in order to see it. This button is either purple, red/orange, green, yellow, grey, or white in color. If the light is flashing rapidly this means you have a stuck button on one of your remote controls. Take the batteries out of each remote control. When you remove the batteries from the bad remote, the light will stop flashing. This remote needs to be replaced.
  2. If one of your neighbor's remote controls is inadvertently programmed into your receiver, your door will open when their remote is activated. If this happens you will need to clear out your receiver and reprogram your remote controls:
    1. Press and hold the LEARN button for six seconds, or until you see the small LED light near the button turn itself off.
    2. If the above steps have been followed and the symptoms continue, there may be an electronic short in either the wall control button or the receiver logic board. In this case, remove the wall control wires from terminals one and two (or red and white) on the motor unit. Should the symptoms persist after the wires are removed, replace the receiver logic board. If the symptoms stop with the wall control wires removed from the motor unit, replace the wall control button, and the wires leading to the wall control button.

Sears Craftsman... | Answered on Mar 08, 2019

The Coromaster 2000 does not operate off limit switches. It has a quarter-revolution optical pulse counter. To re-program the open and close limits do the following: Ensure that the door is open at least a couple of feet. Press the reset button once or twice Short out pushbutton and common and hold until close limit and then release. Door should stop at your new close limit. Wait 5 seconds. Short out pushbutton and common and door will open. Hold the short until open limit and then release. Limits should now be set.

Sears Craftsman... | Answered on Feb 10, 2019

garage door keypad code... how do I reset it? I have a craftsman

Sears Craftsman... | Answered on Jan 06, 2019

One possible reason. (RF) Interference from an ultrasonic humidifier. The radio wave created to create the mist will cancel out a garage door opener I learned it the hard way I almost replace two garage door opener's but I turned off humidifier and everything worked in my Internet works better now too. Just passing this tip on hope I helped.

Sears Craftsman... | Answered on Dec 29, 2018

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