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

1 Answer

My opener will not go up or down when wall button or remote is engaged.The LED only blinks.We have to open and close manually it is a 41A5021-1D

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  • Don Maggard Apr 04, 2011

    Which LED is blinking? Is it blinking a code or just randomly?

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  • Master
  • 3,197 Answers

Trolley is probably jammed against the bolt just in front of the motor.

Posted on Apr 06, 2011

  • Jeff s Nov 14, 2012

    I have the same problem as stated above my led light on the logic board is blinking once every 5 secs. Could the board be bad?

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1 Answer

I have a model 139.53672srt1 garage door opener.Door opened fine but will not close from remote or wall switch, light goes on but door does not move or engage.


if you hold down the wall button will the door close? if yes, then the safety photo sensors are the issue==pretty common issue. either they are not aligned or one of the wires to then is lose or broken or shorted out(staples thru the insulation)

Jul 10, 2015 | Building Materials

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Moved to a place with a 139.53975SRT1 Garage Door and Keyless Entry. Keyless entry stopped working and I cant get code to operate door. All remotes stopped working. Reset codes with Learn button,...


Try this method for programming. Press and hold the button down on the remote while you press and immediately release the learn button. Do this for each remote.

Have you replaced the battery in the keypad? Try 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.

Post back with your results.

Jan 14, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Remote and my keypad remote both stopped working as of today


CHECK TO SEE IF THE LED ON THE WALL BUTTON IS BLINKING - IF IT IS SOMEONE HAS PUSHED THE VACATION LOCK BUTTON.
PRESS THE LOCK BUTTON TO MAKE THE LED STAY CONSTANT AND IT IS FIXED.
HOPE THIS HELPS

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

1 Answer

How do you set the garage door opener for a 2004 toyota 4runner LTD?


You hold the remote close to the three buttons on the vehicle. You choose which button you want the remote to transmit to, and you hold it down. With your other hand, depress the garage door remote opener, and hold it very close to the 3-button assembly. Wait for the red L.E.D. light to blink slowly. If it does not blink slow, continue moving the remote around, until it does blink slow. When it starts to blink slowly, stop moving the remote around. Wait until the light starts blinking rapidly. When the light blinks rapidly, the process is complete.

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1 Answer

I have to hold down the wall mounted opener the entire time that the door is closing. The remote will not close the door. They both open the door fine.


Look at the back of the opener, the LED light blinks. Count how many blinks, then go to the troubleshooting guide to find the fault.

Jun 28, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

GARAGE DOOR OPENS AND CLOSES ON OWN LT BLINKS SEVERAL TIMES


Anytime a door opens and/or closes by itself 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.

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 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.

This can also interfere with remote controls

HOPE THIS HELPS

Mar 12, 2009 | Sears Craftsman LiftMaster Chamberlain...

4 Answers

Craftsman Garage Opener Clicks only and LED blinking 5 times


Just fixed this problem tonight. Had the 5 blink/flash thing. Opened it up and saw that the motor wasn't spinning so it wasn't a bad rpm sensor. Jumped the red to black and then the blue to black to verify motor worked. At that point assumed it was the logic board not telling the motor to start, but I could hear the click of the relay. Pulled the logic board out and noticed a solder joint that had failed directly behind one of the relays. Resoldered that joint and the garage door opener worked again like a dream. Hope that helps someone else.

Feb 28, 2009 | Building Materials

3 Answers

Craftsman Garage Opener Clicks only and LED blinking 5 times


first off, hitting extra button on remote would not do anything. Is door up or down/ where is trolley that attaches to chain, by door or motor. Is is jamned against a bolt. Try a paper clip and jump from white to read terminal. Does it work. Does light bulb blink 10 times. I ignore the diagnostic lights and go by symptons. Give more info.

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

6 Answers

Garage door remote won't open the garage door


The little button with a padlock on the wall control is a "vacation" lockout feature that disables the remotes. There should be a small LED on the wall control that is always on steady. When the padlock button is pressed and released the LED should be constantly blinking (indicating the vacation lockout mode is active) and your remotes should be disabled. The wall control will still operate the door. Pushing the padlock button again should make the LED stop blinking and restore the door to normal operation.

Jun 18, 2008 | Sears Craftsman LiftMaster Chamberlain...

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