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

1 Answer

Sears craftsman garage door - no power

I just put in a new capacitor and now I have no power to the opener. The overall connection works and power to the outlet. Do you know why the system has no power? Is there a reset button? It is completely dead.



Posted by on

  • Tammy65 Jul 01, 2008

    had a repair man visit. Not the capacitor. Couldn't fix it. RPM sensor was faulty but when replaced, it bypassed the "over ride" margins or something like that. There was more to it than that. I'm just going to replace it.

    Thanks anyway

    PS opener was 13 years old.



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 written 20 answers of more than 400 characters.

  • Expert
  • 91 Answers

I've been putting up doors for quite awhile and never had the need to replace the capacitor in an opener. What brought you to do that? Oh wait, there was an old as heck opener that had a cap that spit out stuff if you used the opener more than once. How old is the opener?

Posted on Jun 27, 2008

  • Jim  K
    Jim K Jul 01, 2008

    That sounds like the back-board (main electronic part of the operator). It sounds like you got hit by lightning (near by) or a power surge. I have never had just a rpm sensor only go bad.

    Replacing the opener is a good way to go, by the time you pay for repairing it you can spend abit more and get a new one with a new warranty and new technology.

    On average I have found openers last 15yrs.

    Keep your door in good running condition and the new opener should last you atleast that long.

    Also ask about a surge protector for the opener if you are in an area with alot of storms. Liftmaster makes one that will protect the sensors and wall button and opener incase of lightning and power surges.



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 Repairman 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 repair professionals here in the US.
click here to Talk to a Repairman (only 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:

1 Answer

Just put in new craftsman 3/4 garage door opener it goes about 5in and comes back whats the matter..?? we cked setting

Did you install the door sensors? If you did, make sure the light on each one is lit and not flickering. Double check your wiring. Make sure you connected the wires from the door sensors correctly. They are color coded.

Sep 12, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My 1/2 hp sears craftsman garage door opener bought in 1992 has stopped working, The motor hums when the remote or wall button is pressed but the door will not move at all. Please help

Most common cause of the problem you describe is a bad start capacitor. Remove the cover from the motor unit. The capacitor is about 5 inches long and 2 inches in diameter.

Dec 02, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door motor dead

Keep checking for loose wires. Nothing about changing the gear should cause the motor to stop running. Check the wires on the start capacitor and follow the white wire from the motor and make sure it is connected.

Dec 18, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Remotes quit working on Craftsman 53975 garage

It sounds like you have a logic board problem. If your remotes work at all it is not a programming problem. You could pull the logic board and check for loose connections especially around the small transformer. 18 years for an opener is very lucky. Their average life is about 1/2 that.

Oct 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Cant get wireless Keypad to Link to new Garage Door Opener

The radio frequency has changed and the old keypad will not work with the new opener.

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

1 Answer

Intermittant problem

Look at the lights on the safety eyes also. If all of these lights go off at the same time, there is definately a power issue. It is either an issue with the electical outlet or the circuit board.

Feb 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Brand new craftsman remotes don't work when garage is closed

Yes, it seems to be a frequency issue.  Craftsman usually guarantees 50 foot range on your remotes.  Contact Craftsman, they will probably work with you to solve the problem. 

Dec 31, 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:

201 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

5268 Answers

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

Answer questions

Manuals & User Guides