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

2 Answers

Motor moves 5 in" and reverses and light blinks 5 times

I have a craftsman 1/2 hp that is about 2 years old. The learn light flashes 5 times and the door goes down about 5 inches and returns. No light bulbs flash(misalighned sensors) and i have tried reprograming openers and evertything else. In the manual it says replace rpm sensor-Idid two times-same thing. One of my sensors has no light at all- I think the bulb may be burned out; the light still comes on when i walk through it and i have put them within 10 inches of each other and still no light on one of the sensors.It was working with only one light for a long time. I have replaced the logic board about 6 months ago and dont want to do it again. The learn light does not flash 6 times indicating logic board problems. help

Posted by on

  • meisbepat Feb 18, 2009

    I just bought 2 new door openers. I only installed the first one and am having the same issue. I get about 6" of downward travel then it reverses and gives me 5 blinking diag lights. No flashing unit lights indicating eyes, and both eyes have solid lights. I took it apart and swapped the rpm sensor with the other unit. Same thing, 6" of downard travel then it reverses and gives 5 lights. I'm to the conclusion that my only other option is the logic board, but the thing is BRAND NEW. Do you think it could really be the logic board?

×

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 4 Answers

In the manual it says if you can hold the wall button down & door closes. You have a short in the wiring to the reciever eye. Try substituting some new bell wire in its place, or test the wires for continuity.

Posted on Jan 29, 2009

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 118 Answers

Replace safety eyes

Posted on Jan 29, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

LiftMaster Pro 1/2 hp 41AS050-1 won't shut. when


Check the resistance down button (There is one for down and another one for up). You may need to adjust the sensitivity. That way even if for some reason the have hard time coming down, less sensitivity may solve that issue.

Oct 22, 2013 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

I have a chamberlain liftmaster professional Formula 1 Garage door opener that has been working for 5 years. Now will not go down unless you hold the main button. Sensors blink when it hits within 3...


Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. They each have a small light that should be lit, both should be the same brightness and not flickering ever so slightly. If not tweak them a bit. If both lights will not come on you have bad sensors.

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

1 Answer

Can you help me? I have a Craftsman HP 1/2 Garage


If the main light flashes 10 times when the door reverses it is your door sensors. Most probably out of alignment but they could always go bad. See if each of them has a small light that should be lit and not flickering. If one of them is out tweak the sensor a bit to see if it will come on. If not one or both is bad.

If the door hits the floor and reverses but the main light does not flash 10 times then the door is traveling too far. On the side of the motor unit you will find the 'down limit'. Turn this in the opposite direction of the arrow printed on the cover. Some adjusting may be necessary.

Nov 10, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

1/2 HP Craftsman Garage Door Opener works but lights don't


I think you are saying that normal incandescent bulbs do not work. If that is correct you should unplug the unit and using a small screwdriver reach into the socket and pull out slightly on the center contact.

Aug 07, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Keypad won't work anymore


Lets make sure you are programming it correctly, make sure the battery is new. Press and release the learn button on the motor. Within 30 seconds enter in the 4 digit code followed by the up/down button. The light bulb should flash once. If you can't get it to code in this way you will need to replace the keypad. Thanks BB

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

1 Answer

Programming kepad for Sears Craftsman Garagedoor opener 1/2 hp


The only procedure I have ever followed is to press the learn button and then enter the code, and not do anything else. I think your last step of holding the button until the light goes out is clearing codes as fast as you enter them. Just stop after you enter your code and let the learn mode time out on its own. That should do it.

And don't put your head through the wall. It just causes more headaches.

Feb 21, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opens about 18" and stops


Check the drive belt for tightness. Check for a bent or obstructed track. Overhead door openers have a safety clutch built in in case something or someone gets into the path.

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

1 Answer

Craftsman garage door opener won't close completely


look on the side of the openeer usually lekt looking at it from the rear theese are your travel adjusters one turn = 2" travel normally

Jan 07, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opener moves foward about 10 inches then returns


UNPLUG THE UNIT FOR ABOUT 5 MIN. TO RESET TRY TO OPERATE IF IT STILL MOVES 6-8 INCHES AND FLASHES 5 TIMES THE RPM SENSOR IS YOUR PROBLEM - COULD JUST BE THE CUP HAS MOVED ON THE SHAFT. IF IT IS IN PLACE AND STILL NOT WORKING REPLACE THE PICKUP.

Dec 11, 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

541 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

Mike

Level 3 Expert

4348 Answers

Cindy Wells

Level 3 Expert

5387 Answers

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

Answer questions

Manuals & User Guides

Loading...