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

1 Answer

Door opener hits plastic light cover

With the Craftsman 1/2 HP ....The chain is not taught and the opener bangs into the plastic light cover

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 118 Answers

If the chain is loose, The gear and sprocket is probably worn out. To solve the immediate problem. Tighten chain until it is not loose and you need to adjust the up limit. There will be 2 screws on the side with a picture of the door, one has an arrow up and one has an arrow down. The one with the up arrow needs to be turned down. Adjust until the door opens even with the top of the door opening. You will probably have to replace the gear and sprocket in the near future.

Posted on Feb 09, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How do I update software

About 496,000 results (0.43 seconds) Search Results

    [PDF]GARAGE DOOR OPENER Model 3265 1/2 HP ... - LiftMaster Chamberlain GroupFasten the manual near the garage door after installation. .... This garage door openerhas been designed and tested to offer safe service provided it is installed, ...

    Manuals Download Craftsman Garage Door Opener Model ...

    CraftsmanCraftsman has the best selection of Garage Door Openers in stock. Get the Garage Door Openers you want from the brands you love today at Craftsman.

    Craftsman 1/2 HP Chain Drive Garage Door Opener - Sears > ... > Garage Door Openers

    Craftsman1/2 hp Chain Drive Garage Door Opener Opens by Remote, Inside and from Car Enjoy a great end to every day by ... Owners manual - English (Warranty).

    Free Craftsman Garage Door Opener User Manuals ...

Feb 03, 2016 | Kenwood DNX-690HD eXcelon DVD Receiver...

2 Answers

My girlfriend has a 1/2 hp Craftsman garage door opener (model 139.5398511) which operates fine when cool but after several uses or later in the day the opener only partly opens the door (the height varies...

there is little chance for the board to be affected by the melting of plastic covers of light. if the circuitry is damaged by the heat, you'd notice the problems immediately, if it is working fine now, then there is no chance for this incident to affect the working in future.


Jul 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman 1\2 hp clicks, motor wurrs for 1 sec', but doesn't open

You have a stripped gear on the opener. Take off the cover on the motor. The bottom of the cover will be filled with white shavings. You can repair this with a "liftmaster gear and sprocket assembly".

Feb 24, 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...

5 Answers

Craftsman garage door opener

you can order a new gear kit from amazon for $20. It's and easy fix.

Dec 12, 2007 | Sears Craftsman LiftMaster Chamberlain...

Not finding what you are looking for?
Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ Logo

94 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sears Building Materials Experts

Glenn Mayer
Glenn Mayer

Level 2 Expert

91 Answers


Level 3 Expert

4345 Answers

Cindy Wells

Level 3 Expert

5300 Answers

Are you a Sears Building Material Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides