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

1 Answer

Garage Door Openenr Motor Buzz

I have tow Craftsman 1/2 HP garade door openers. On the single garage door, the motor buzzes for a few seconds and nothing happens. The yellow light on the moror back continuosly flashes. I rpogrammed the remote control by pressing the red button until the yellow light stays on continously, and then pressing the key on the remote control. The main light flashes once as it should do, but the yellow light next to the red button continuous to flash. Do I need a new unit?

Posted by on

  • 1 more comment 
  • prafsurti Nov 11, 2008

    To: peenyfixit

    Thank you for the tip. Unfortunately I am currently out of state and will return home late on Friday and hope to try your fix the next day. I will keep you informed.

    By the way why does the little yellow light next to the Red learn button on the back of the opener keep on flashing? The same light on the similar unit on our 2 door garage does not flash.

  • Anonymous Mar 13, 2014

    when I press the remote, the gate motor receiver accepts the remote signal and the status light flashes but the motor does not turn.

  • Anonymous Mar 27, 2014

    motor not even running when i press remote



1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Look at your manuel find the page that shows the limit access switch. (Unplug your opener.) It isn't really a switch, but the three white plastic screw like parts. The center has a brown wire connected to it, which has a metal piece that is as wide as all three white screws. The outside screws are your limit access stop guides, one for the up control stop guide and the other for the down control stop guide. If the center screw with the metal part gets caught behind on of the stop guides the motor will not engage. Gently move metal piece from behind the stop guide.

Posted on Nov 10, 2008

  • pennyfixit Nov 11, 2008

    The light flashes because the motor is trying to engage, but is unable to for safety purposes...I believe the limit switch is stuck. Once you resolve that, the opener will work. Have you pressed and held the "learn" button? If you have, you will need to redo your remotes once the unit is back working properly and any testing of your unit has to be from the main hardwired remote on your garage wall.



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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Don't know Mod. No. lost installation manual, approx. 5 yrs. old Need installation manual.

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 | Building Materials

1 Answer

Craftsman 1/2 hp garage opener opens and closes, but when it is finished closing the opener buzzes. When I put the door up the buzzing stops. The light has not worked for several years. I replaced

For the lights, very common the contacts get flattened out and melted. I see this every day. Unplug the opener and let it sit for about 30 min. I never wait but just to be safe, let the capacitor loose its charge. With a precision flathead screwdriver or fingernail, bend the contacts in the light socket out about 1/8". Should help. Buzzing concerns me a little. May be an electrical issue. These openers use an AC brushed motor. They get very hot and in rare cases can catch fire. Theres gear grease and dust inside that has ignited in a few motors. There is an overheat switch built in but dont count on it. I would suggest buying a new machine. Find a DC motor with a belt drive. They last the longest and require the least maintenance. Marantec make the best in my opinion.

Aug 30, 2014 | Craftsman 1/2 HP CHain Drive Garage Door...

1 Answer

When I push the keypad all I get is short buzz from the motor then it shuts off

Sounds like the motor is seized up. If the door moves at all, I would say the beams are not aligned correctly.

Feb 25, 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

My 41A4315-7a Garage door opener Motor does not engage. It just hum sfor a second then stops. I checked the internal gears and they seem fine. The door buzzes for a second then stops. Any Ideas.

If the door is not stuck in the open position and just hums you could have a bad start capacitor. It is alongside the motor and has 4 wires going to it.

Dec 15, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door will open and close one time, then it will not open unless i unplug the unit for a few seconds. then it will open and close one time then have to unplug again. it's a craftsman 1/2 hp

The motor has a thermal overload switch that may be causing the symptom you describe. It is to protect the motor in case of overheating. Maybe not operating it so much will help with your problem.

Aug 13, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman Garage Opener (Unit run front & back only for 2 second)

Double check to make sure the sensors are wired correctly. The 2 solid white wires go to terminal 2 and the wires with black stripes go to terminal 3. If the wiring is correct then you possibly have a bad RPM sensor. The RPM sensor is a small circuit board just in front of the motor.

Jul 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain model 1100 wont close




Mar 17, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Had to push green reset button on 1/3 hp garage master motor

pushed it too long. push 1 second and recode keypad. you wiped out codes by hitting for 6 seconds or more

Dec 04, 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

1,216 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

4349 Answers

Cindy Wells

Level 3 Expert

5418 Answers

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

Answer questions

Manuals & User Guides