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

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Light still works with remote; garage door opener will not communicate with the motor. Thoughts?

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If you have more than one remote and neither one will communicate with the motor you have a bad logic board.

Posted on Jun 01, 2010

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Digidoor remote


"Another reason is problems with the radio frequency of the remote control system used, some older systems use frequencies that are liable to interference from various sources such as police and fire department radios and military communications. The effects of this interference are many for example, the garage door may open and close on its own or the operating range of your remote control may become so poor you cannot open or close the door with your remote control even whilst standing next to it."
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We have Craftsman garage door openers for both doors on our double car garage. The problem is with our keypad and our remotes in the cars. The keypad and car remotes work fine for one side of the garage,...


It sounds like the logic board has quit working on the one opener. If you have had lightning or power surges you might remove the logic board and check for loose, burnt or missing traces on the printed circuit.

Jul 12, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftman Garage Door Opener Quit Working.


It could be a bad logic board especially if you have had any electrical storms in the area. I would remove and check the logic board for burnt or missing traces on the printed circuit board.

Sep 14, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door will not close with remote.


The code you are seeing with 5 blinks is "RPM sensor or motor overload." We can eliminate the motor overload because the door is trying to close. The RPM sensor is a small printed circuit board just in front of the motor. It's a snap to replace and is available at any good door opener company. They will know exactly what you are talking about if you ask for an RPM sensor board.

Aug 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman 1/2 HP garage door opener with one green and one yellow


It sounds like a logic board problem to me. I would remove the board and look for bad connections especially around that small transformer.

Aug 19, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door will not open with wall switch or remote


Depending on the type of motor that is used in your garage door opener, it could be something as small as a start capacitor, or potentially a bad motor. Hope this helps

Aug 17, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Garage Master 1/3 HP 1997 Door Working, not responding to Remote


I have the exact same situation, except my model (139.53607) is older than yours and does not even have an LED. Remotes only works after after shop light goes off (5 minutes or so), but wall button works fine. Did call Sears Service and the tech told me the logic board is probably shot. Don't want to waste money on service call so I'll probably have to buy a completely new unit in the Spring and go through the winter without the use of a remote.

Jan 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Garage door only opens with wall unit


a component in the wall unit is failing , that makes the conection happen when the remote signal is recieved , ( it is recieving the remote signal but not sending it out to the control circuit for the motor )

Dec 29, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door keypad & remote


You need to sync both. I have a LiftMaster. If you want to change the code on your keypad you need to open up the garage door motor compartment where the light is (mine is in the back). Press the learn button, within 30 seconds enter the new code on your keypad and hold down the enter button for several seconds until the light on the opener blinks to tell you it has learned the code. Test the new code to see if it works. If the new keypad code works, then try the remote. My remote will not work after I reprogram the keypad. If the remote does not work (check battery) then climb back up the ladder and press the learn button on the garage door motor again, press the remote button and hold down until the light blinks again and the opener has learned the new code. This process works when I need to sync my remote and keypad. Good luck, I hope this helps.

Jul 21, 2008 | Sears Craftsman LiftMaster Chamberlain...

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