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

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Motor runs but door does not open on my craftsman 1/2 h.p. Garage door opener

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Remove the cover from the motor unit and check the drive gear. It is a white nylon gear just in front of the motor and is most likely stripped.

Posted on May 17, 2010

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SOURCE: Craftsman Garage Door Opener Won't Open

When mine did this, it was because the nylon gears that drive the chain had stripped. My wife had to live without the opener for a week or more, but I was able to find a new gear kit online and replace the damaged gears. It wasn't difficult.
The other option is to buy a new opener.

Posted on Dec 07, 2008

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SOURCE: Pulling mechansm jammed on 1/2 hp craftsman garage door opener

You have a stripped gear inside the opener

Posted on Jan 18, 2009

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SOURCE: motor runs but door does not open

reconnect your safty release red cord

Posted on Feb 17, 2009

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SOURCE: My Craftsman 1/2 HP Garage Door Opener stopped

Remove the cover and take a look. I'm sure you will find the drive gear is stripped. It is a white nylon gear just in front of the motor. You can buy one at any good door service company. The part number is 41A2817 and it comes with instructions.

Posted on Nov 16, 2009

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SOURCE: motor runs but door does not open on my craftsman

Remove the cover from the motor unit and you will find the drive gear has stripped. The part number is 41A2817 and is available at any good opener service company. It comes with instructions.

Posted on Mar 23, 2010

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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

I have a Craftsman/Chamberlain 1/2 hp 315mhz Garage door opener model 139.1845.DM just stopped working. The motor runs the chain moves, the door doesn't open. Whether I use the remote or pad still n


All garage door openers have a quick release. Have you checked to make sure that is locked in place? Most have a cord hangin from it and you pull it which releases it from the chain. Make sure that is engaged and it should work.

Dec 02, 2011 | Home Security

1 Answer

Craftsman 1/2 HP garage door opener Model 139.53962SRT1 and am getting 5 error code flashes.


That code is for "RPM sensor or motor overload." Check to see if the trolley is jammed against the bolt just in front of the motor. If it is, loosen the chain enough to take off the stress and then run the opener until the door closes. While the door is closed locate the 'up limit' control on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

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

1 Answer

Craftsman 1/2 hp garage door opener motor just buzzes when the remote is pushed no movement


Check to see if the trolley is jammed against the bolt just in front of the motor unit. If so loosen the chain enough to remove the tension of the trolley. Now run the motor until the door closes. While the door is closed, locate the 'up limit' control on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.


Jan 21, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Motor runs but door does not open on my craftsman 1/2 h.p. garage door opener


Remove the cover from the motor unit and you will find the drive gear has stripped. The part number is 41A2817 and is available at any good opener service company. It comes with instructions.

Mar 23, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door doesn't open and close properly


Loosen the chain enough so that you can remove it from the sprocket above the motor unit. With the door closed run the motor until the sprocket turns clockwise and stops. With everything attached replace and tighten the chain. Some adjusting of the up and down limits will probably be required.


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

2 Answers

My Craftsman 1/2 HP Garage Door Opener stopped working. The motor is running but chain isn't moving. The actual door goes up and down fine.


Remove the cover and take a look. I'm sure you will find the drive gear is stripped. It is a white nylon gear just in front of the motor. You can buy one at any good door service company. The part number is 41A2817 and it comes with instructions.

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

3 Answers

Motor runs but door does not open


you have a stripped gear on your opener. Replace gear and sprocket kit

Feb 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opener motor will not open garage door


It sounds like you did a really good job! My Craftsman 1/2 hp gar. dr. opener has a red reset button on it on the l/h side as you are looking at the light/motor from the garage door opening. You have to take the light cover off to be able to see it. My reset button is on the same side as the ground wire. You might check the ground wire while you're there. I really hope that this fixes it for you (and me). I'm quite sure it will as you know your way around the garage door opener already. Good Luck and Let me Know (Please) if it fixed it or not. If I think of anything else, I'll let you know. Have a Good Day!

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

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