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

1 Answer

Changed gear box in craftsman garage door opener

No garage door closes and then goes back up. Made several adjustments but no luck. Help

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Champion:

    An expert who has answered 200 questions.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 244 Answers

You did not give enough info. If it closes completely and right away goes up, if bulb blinking. if it is, something on door is blocking safety beam. If light is not blinking, DECREASE down travel.

Posted on Jan 15, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Craftsman 1/2 H/P garage door opener door goes closed but then opens


Try adjusting the "closed switch" forward a little in case the door is going too far when trying to close.

Sep 03, 2014 | Garage Doors

1 Answer

Craftsman 1/2 hp garage door opener will start to close and after 2-3 seconds it goes back up and there is no obstruction blocking sensors


you may need to adjust limit switches in back of operator.Most of the time with this problem one of the gears inside the operator has stripped out.

Jan 26, 2013 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door starts to open goes up several feet and then won't finish opening and then closes.


You have either a broken door spring or a stripped drive gear. The drive gear is white nylon and is just in front of the motor. It will be obvious if it is bad.

Dec 08, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

The garage door closes and then opens up again, I have to close it several times before it secures. There are no obstructions. Is this a sensitivity problem?


More than one thing can cause this type problem.

If the main light flashes 10 times when the door reverses it is a door sensor problem. Make sure they are pointed at one another and the small light on each one is not flickering ever so slightly.

If the door reverses when it hits the floor it is a sign that the door is traveling a bit to far. The adjustment for this is on the side of the motor unit. Turn the 'down limit' in the opposite direction of the arrow printed on the cover. Some tweaking will probably be necessary.

Jul 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My crafstman garage door opener goes down and then


Remove the cover from the motor unit and check the drive gear. It is a white nylon gear and is probably stripped.

May 14, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Older model 1/3 hp craftsman goes up not down with remote


Your door sensors are either bad or need simply to be aligned. They must be pointed at one another to work properly. Each of them has a small light that will be lit when they are pointed correctly.

Sep 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opens about 2 feet and then closes in same cycle


There is an issue with the limit settings. They are the three white screws you can see with the cover off. Put the door in the down position. take the small white piece off the bottom of the gear and sprocket assembly. Turn the center screw until the silver "wing" is at the bottom position. Put the white piece back on the bottom of the gear and sprocket. Adjust the up screw until the door opens fully. Check the force settings. They both should be set on 4-5.

Feb 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

Motor runs but door does not open


you have a stripped gear on your opener. Replace gear and sprocket kit

Feb 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door won't shut after changing gears


if you changed gears, you may have chain out of sync. read instructions with gear kit on how to sync chain.

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

1 Answer

Craftsman garage door opener


IF IT HITS THE FLOOR AND GOES BACK UP. YOU NEED TO ADJUST THE DOWN LIMIT.

IF IT GOES BACK UP BEFORE HITTING THE FLOOR YOU NEED TO ADJUST THE SENSITIVITY OR THE SAFETY EYES.

TRY THE DOOR MANUALLY AND MAKE SURE IT WORKS SMOOTHLY.

Sep 30, 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:

129 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sears Garage Doors Experts

Al Clark

Level 2 Expert

290 Answers

Cindy Wells

Level 3 Expert

4755 Answers

Pieter Vleeshouwers

Level 3 Expert

1410 Answers

Are you a Sears Garage Door Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...