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

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Light wont activate when door opens on sears model 139653000

Posted by Anonymous on

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  • 2 Answers

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Posted on Jan 02, 2017

  • 118 Answers

SOURCE: Replaced door sensors now door will not go down and light flashes

The safety eyes are either installed wrong, or you have the wrong type. Craftsman (liftmaster) has what they they call old style and new style safety eyes. You can not interchange the types.

Posted on Feb 17, 2009

  • 3197 Answers

SOURCE: Sears Craftman Garage door opener model # 41A3493-1

That isn't the model number you give it is the part number for the logic board. The model number is on the opposite end of the motor unit and starts with 139. If you are asking if the opener should reverse when it hits an obstacle the answer is yes. If it doesn't it is not adjusted correctly or is faulty.

Posted on Dec 01, 2009

  • 3197 Answers

SOURCE: HAVE SEARS/CHAMBERLAIN

Look at the LED light next to the SMART/LEARN button on rear of the motor unit. You may need to remove a light lens cover in order to see it. 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.


If one of your neighbors remote controls is inadvertently programmed into your receiver, you door will open when their remote is activated. If this happens you will need to clear out your receiver and reprogram your remote controls. Press and hold the smart/learn button for 6 seconds or until you see the small LED light near the button turn itself off. 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 1 and 2 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.

Posted on Dec 22, 2009

  • 603 Answers

SOURCE: I have a Sears Craftsman Garage Door Opener Model

Spring broke.
Have someone out to fix it.
These things are dangerous and can cut off fingers.
If you think you can do it yourself - DON'T!

Posted on Jan 14, 2010

  • 3197 Answers

SOURCE: sears 1/2 hsp garage door opener. remote control

I would suspect you have a light bulb that is radiating and causing interference with the receiver. Remove the light bulb and try. You can also try this: Unplug the unit and using a small screwdriver pull out on the center connection in the light socket. This will tighten the connection and prevent arcing.

Posted on Feb 08, 2010

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1 Answer

When garage door is opening the safety sensors activate and starts closesing the garage door. They should activate when I close the garage door.How can I correct this action?


How do you know it is the sensors? Has this opener ever worked properly? Do the main lights flash 10 times when the door reverses? If the opener worked before have you had it apart or done some work to it?

Jan 24, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

R garage door opener model 139.53640srt -remote car openers wont work suddenly. have to open using the house opener, whose light is blinking


Press and hold for 3 seconds the lock button on the wall control. The light should stop blinking and your remotes should now work.

Nov 07, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Sears garage door opener wont open when the remote it presses. The opener kicks on but only for a second and then the lights flash off an on.


Check the door sensors. Make sure they are pointed at one another and that each one has a small light that is lit and not flickering. If you can't get both lights to come on you have bad door sensors.

Jan 19, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Have a Craftsman Garage door opener - doesn't activate, only the light blinks. Neither sensor has any lights lit. Any suggestions?


If you mean the main light blinks when you try to close the door then you have bad door sensors or the wiring going to them. Make sure the connections are tight and the wire is not broken somewhere.

Nov 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door wont work with remote


If the small light in your wall control is blinking it is in the lock mode. Press and hold for 3 seconds the button with the icon of a lock. This will toggle the lock function off.

Aug 04, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Replaced door sensors now door will not go down and light flashes


The safety eyes are either installed wrong, or you have the wrong type. Craftsman (liftmaster) has what they they call old style and new style safety eyes. You can not interchange the types.

Feb 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

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