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

2 Answers

I have a 1/5 hp opener and just replaced some cement floor and now the door does not come down all the way. Have looked at controls on side of opener an no adj for lower the door. Cant find the manual. Can any one help??

Posted by on

  • bobhender45 Nov 06, 2010

    Well it has 2 adjustments, open force and close force. I adjusted close force less and no change and then back to original close force and no change. What is next??

  • bobhender45 Nov 07, 2010

    Motor size was a type for 1/2 motor and it sure did fix it. Thanks bunches.


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,340 Answers

Did you typo the 1/5 hp?I cannot find any that low.Here is a link to one from Sears,not your exact model,but many look the same.The manual to download is on the page.Your info is on pg. 28 of this one.It does show adjustment controls.It says to turn the screw counterclockwise one turn for every 2 inches of movement required.It also shows both controls are in the same area on the side.Seeing how you do not have the manual,did you see 2 screw sets available?

There was no info about model 976LM anywhere but here is a link also to more.I entered in everything as it appears above also.
If you need more help let me know.I hope this takes care of it though.Good luck,Greg

Posted on Nov 07, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 10,865 Answers

Hi Bob. Turn the adjustment you have 1/2 turn in either direction. It will either raise it a bit or lower it a bit. Once you know which way to turn it [typically clockwise to lower it] then gradually make the adjustment you need. Joe

Posted on Nov 06, 2010

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.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

Door closes only by holding control button down thru the time of operation?

Either you have an obstruction between the two sensors on floor on each side of door or the safety circuit is defective.

Make sure both are properly connected. One should be lit up and when you place something in between the sensors the light should go out.

Mar 22, 2016 | Craftsman 1/2 HP CHain Drive Garage Door...

1 Answer

How do I get my garage door to open?

broken springs...door to heavy for motor to lift call a pro

Oct 11, 2014 | Building Materials

1 Answer

Garage door opener fluctuating up and down travel?

reprogram the system with the control fob as it indicates that the program is corrupted possibly from recent power fluctuations

Jul 21, 2017 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Chamberlain Liftmaster Professional 1/2 HP door goes down all the way but then it comes back up again. I see nothing in the way at all. is there some way to adjust the sentsitivity on it???

If the door is hitting the floor and then reversing you need to adjust the down limit control. This control is on the side of the motor unit. Turn the control a couple turns in the opposite direction of the arrow printed on the cover. This should stop the door short of the floor. Now some tweaking of that control will most likely be necessary to get it just right. Just remember if you run the motor too much it will shut off on the thermal overload and you will have to wait as much as 15 minutes for it to cool.

Aug 27, 2012 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have Sears Craftman 1/2 HP garage door open that want stay shut when you push the remote the sensor wire broke fix that. Now the door goes down and come back up. All sensor are led light are green...

Check the sensors again. Our unit has one amber and one green when working and if something (even a weed) breaks the optical beam it reverses and the lights blink. We've also had bright sunlight interrupt the beam. (The test for this issue is to stand such that you cast a shadow onto the sensor without being in the beam and then attempt to close the door with the remote). Next check if the door is binding during travel. If it is, check the tracks for plumb with a level and make sure the door rollers and tracks are undamaged. If a rail is crimped anywhere, it could be cause the problem. You can find some garage door sales places that sell the track sections and rollers to replace damaged parts. Check your local phone book and call around. In some cases, the door jamb may be damaged (lowering the header and shrinking the entire door area). This may require calling a professional to fix.

If the door itself is moving easily, then it sounds like the door might be hitting the floor too lightly or trying to go past the floor and triggering a safety reverse. On most of the openers, there are several adjustments you can work on to reset this. First try adjusting the down limit to above the floor and then bring it back to the floor. (However, usually these do not make the opener light blink.)

Alternatively, adjust the downward force to a higher value.

Without knowing the model of your Craftsman opener, I'll just use the directions for mine. All of these are adjusted with a flat blade screwdriver. Always test each adjustment with a complete up and down cycle.

The height limit control is on the side. (It's the forward one of two screws inside the cover - you should be able to reach them thtrough holes in the cover. Unfortunately, sometimes it's easier to get to them after removing the cover. The cover is held by 4 screws - 2 on each side.) To decrease the travel, turn the Down screw clockwise. One full turn of the screw is 2" of door travel.

The force controls are on the back with the down adjustment on the right. Turn this clockwise in 10 degree increments and test each time.

It is possible to overheat the opener with too many open and close cycles. In that case stop adjusting the unit and wait 15 minutes for it to cool.

I hope this helps.

Cindy Wells

Nov 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Changed the blades on my mower&now it sort of scalps on one side while this an easy fix or am i stuck in a repair waiting line?

First If you have a flat spot cement floor drive the mower onto the cement then drop the deck to mow Shut power down and engage blade mechanism, next get a tape measure and measure on one side the the other on the from and rear corners is the deck level? if not look at what might be causing it to be out of alignment. if it is level all away around then there may be a problem with the blade. check the side that is doing what your saying see if it is level or angled upwards in the front or back, if the deck is not level you should be able to figure out what is causing it. thanks for using fix ya and if you need more help just post what you found.

Jun 16, 2010 | Craftsman 42" Briggs Stratton 20 hp Gas...

1 Answer

Roller door touches bottom cement and reopens again

Your door is traveling too far in the down direction. Locate the 'down limit' control on the side of your motor unit and turn the control one full turn in the opposite direction of the arrow printed on the cover. Some tweaking will probably be necessary to get it just right.

May 03, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman 1/2hp garage door opener does not go down to floor

I'm no expert, but on a previous door opener I had (don't know the brand), the side adjusting screw basically adjusted a limit switch, which was located inside the plastic housing (where the motor is). I was able to remove the housing, figure out which limit switch was actually being contacted "too soon" on the way down and adjusted it while watching it.

Just a suggestion, you might take a look.

just keep your hands out of the way of the chain and sprocket if you do take the housing off. .

Mar 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers


is bulb on motor flashing 10 times. then you have electric eye problem. otherwise, sounds like you need to increase down force a hair. adjustement is on logic board, right knob.

Jan 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door wont close all the way


Nov 22, 2008 | Sears Craftsman LiftMaster Chamberlain...

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

Related Topics:

104 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sears Building Materials Experts


Level 3 Expert

4336 Answers

Cindy Wells

Level 3 Expert

5097 Answers

Brad Brown

Level 3 Expert

15557 Answers

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

Answer questions

Manuals & User Guides