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

2 Answers

Sears garage door opener problems

When you press any remote or the wall switch, the light on the opener comes on and you can here a clink but the door does not move. Model 139.53985D Serial 484512200423 Manuf. 11/24/05

Door opens fine, but will not close. The click can be heard and trolley will move 1/4 to 1/2 an inch. Repeated pushing of the switch will continue this action until the trolley hits the stop bolt, then just the click is evident. Its as if the opener doesn't get the signal to turn around and go the other way when it hits the open limit. I know the limit switch is working because the opener will stop, just won't close on the next cylce.

At first I thought the down pressure needed adjusting, but it was all the way up. Next I thought the door was jamming, so I replaced the springs which helped the door move more smoothly, but didn't help the opener problem.

I dug around and found the manual which told me the 5 flashes of the LED meant the RPM sensor was bad. I replaced it and the first time I pushed the switch it didn't work, the second time the door went down. I readjusted the limits and the safety reverse system until everything worked properly. I cycled the door over and over until the motor overheated. Once it reset I tested again and everything worked fine.

That lasted three weeks. Now the problem is back and I am still getting the same diagnostic code. I don't believe the RPM sensor is bad because after many hours of jacking with the limits, unplugging the unit from the wall, taking the cover off and unplugging the limit assembly from the logic board, and cussing at it, it will work properly again. Sometimes it will be OK for a few cylcles, sometimes for a few days.

I have already thrown $30 at the springs, and $40 at the sensor and rush freight, so I'm not going to put $100 into a new logic board whether it is the fix or not.

What I want help with is am I missing something simple or should I junk it and get something else?

Posted by on

  • Barbara knoble Nov 09, 2008

    My Craftsman just hums for a second the light comes on but nothing happens. I too get the 5 flashes...the manual says the springs need t be replaced but I just had them replace a couple months ago...I have the same unit on the other door and never any problems.

    I can not figure it is obviuosly getting voltage but for some reason it doesn't want to work.

  • Peggy Dickinson Feb 12, 2010

    what cause the sproket to keep getting grind into dust, on my craftsman 1/2 hp garage door opener.

    i have replaced it twice. im about ready to trash the whole thing



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 whose answer got voted for 500 times.

  • Master
  • 3,197 Answers

November 2008

Posted on Jul 23, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

No power to the motor the wall control does not light up

Posted on Feb 19, 2010


2 Suggested Answers

  • 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

  • 3197 Answers

SOURCE: I have the craftsman model

Model number 53753.

Posted on Nov 22, 2010

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Garage door opener wall panel light flashing

the lock is turned on. On the wall switch press and hold it for a count of 5. the light should stop blinking

Sep 26, 2016 | Building Materials

1 Answer

I have Garage Door Opener from Sears. Wall push button & the the remote from my car open the door OK , but it does not close the door from my car (which is programmed) Wall push button close the door...

If the main light flashes 10 times when the door reverses to the open position it is a door sensor problem. Make sure the sensors are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have bad sensors.

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

1 Answer

The green light on the wall switch is blinking constantly yet it works to open/close the door. The remote does not work. Any suggestions?

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

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

1 Answer

I have a door with two buttons and remote but only

On the wall control with the flashing light press and hold the button with the lock icon for 3 seconds and release.

Jan 10, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door will open with remotes, but not with the wall switch

Sure sounds like the wall control is bad. Very common problem.

Jun 12, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sear garage door wall mount contol light keeps blinking

Hold the button with the lock icon in for 3 seconds. This should toggle the unit off vacation mode and your remotes will work.

May 31, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Garage door only opens with wall unit

a component in the wall unit is failing , that makes the conection happen when the remote signal is recieved , ( it is recieving the remote signal but not sending it out to the control circuit for the motor )

Dec 29, 2008 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Sears garage door opener problems

check the motor reset or power connected to the motor and check the chain or screw to see if it is in a bind.

Sep 24, 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

1,846 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

5306 Answers

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

Answer questions

Manuals & User Guides