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

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Garage door will not open manually or automatically/normally

Have Craftman's 1/2 horsepower garage door opener mfg 09/2000. It will only open about 1 inch-one sensor light is green and the other is yellow. None of the lights blink when I try to open. The motor and chain seem to work just fine. also the door can not be open manually.

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The color of the sensors is normal and have nothing to do with your problem. If you cannot raise the door manually and it is released from the opener then you have a door problem. If you mean the door won't open and you cannot get into the garage to release the opener then you are going to have to call a door technician for help. He will get in.

Posted on Feb 08, 2010

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Posted on Jan 02, 2017

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What does the purple button light flashing on 1/2 horsepower craftsman garage door opener


I think the adjustment mode is on.

For example, that's from Craftsman manual:

""
Setting the Force
The force setting button is located on the left panel of the motor unit. The force setting measures the amount of force required to open and close the door.
1. Locate the purple button on the left panel of the motor unit (Figure 1).
2. Push the purple button twice to enter the opener into Force Adjustment Mode (Figure 2). The LED (Indicator Light) will flash quickly.
3. Push the remote control or control console (Figure 3). The door will travel to the DOWN (close) position.

""

Actually, you should just read carefully your garage door opener unit's manual.

Craftsman Garage Door Opener Remote

Jun 21, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

New Sears craftman 1/2 horsepower garage door opener not staying closed, trolley is hitting bolt stop and auto reversing.Have tried to adjust the down force and the distasnce down setting to no avail?


The 'down limit' on the side of the motor housing is what needs to be adjusted. Turn this control in the opposite direction of the arrow printed on the cover. I usually adjust this so it stops short by quite a bit and then fine tune it.

Oct 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Is liftmaster control compatible with sear-craftman 139-53635SRT model?


Liftmaster and Craftsman are both made by Chamberlain Mfg. Co. Some controls are compatible and some are not the same as some Craftsman controls are compatible with that model number and some are not. The Liftmaster/Chamberlain control that works with that model opener is 81LM.

Jul 08, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears Craftman Garage door opener model # 41a3493-1. Does it have auto reverse?


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.

Dec 01, 2009 | 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...

2 Answers

I CAN NOT PROGRAM MY BUILT IN CAR REMOTE ON MY NEW 139.53985DM


didnt try everything cause if you did, it would work! Get two people and garage door opener. One read manual from car under Garage door" or Homelink while other pushes button. When manual says if this did not work or if you have security plus or rolling code, continue with other instructions. You will need a working remote and will need to pushh learn button on motor logic board.

Dec 25, 2008 | Sears Craftsman LiftMaster Chamberlain...

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