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

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Garage door will not go up all the way push it and it go's down push it and go's up one foot

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Check your door springs. One is most likely broken.

Posted on Dec 12, 2009

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We just replaced the "trolley" component of the opener, now when we open the garage door it opens about a foot, then stops like its hung on something... it will go back down. If i help it pass the hun


Check your manual and re-program the up/stop and down/stop position. Also make sure the new trolly is in it's proper position.(in the closed position) Hope this helps

Oct 02, 2012 | Chamberlain 3/4-HP Power Drive Chain Drive...

1 Answer

Hello, I replaced a worn out garage door motor with a new craftsman model. The door try's to travel down when the opener is pushed, even though the door is fully closed. I'm no garage door expert, but...


Yes, reread the directions travel needs to be set for both up and down, and MUCH MORE IMPORTANTLY the safety settings must be set. This allows the door to close on a foot and not cause damage....VERY IMPORTANT to set correctly....

Apr 04, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My liftmaster garage door will not close..I have changed the main gear in the machine.. but I have also tried to make it shut without the door attached and it still will not go down. it goes about a foot...


Make sure you put the black cup back onthe end of the motor shaft and that it is pressed all the way on.Make sure the RPM sensor is plugged in. If neither of these are theissue, then you probably did not have the motor shaft pushed all theway back when you tightened the coupler after replacing the wormgear. Loosen that coupler up and from the front of the motor(opposite end in which the coupler is on) push the shaft back as faras it will go. Hold it there while you tighten the coupler back upand then try it.

Dec 11, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Have new logic board and gears. No matter where door is it will go down a foot. reverse and go down a foot. Can't seem to adjust


Make sure you put the black cup back on the end of the motor shaft and that it is pressed all the way on. Make sure the rpm sensor is plugged in. If neither of these are the issue then you probably did not have the motor shaft pushed all the way back when you tightened the coupler after replacing the worm gear. Loosen that coupler up and from the front of the motor (opposite end in which the coupler is on) push the shaft back as far as it will go. Hold it there while you tighten the coupler back up and then try it.

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

1 Answer

Door goes up about a foot and stops


The sensors have nothing to do with your door opening. First thing to check are the door springs. One may be broken. Next remove the cover and check the drive gear. It is a white nylon gear just in front of the motor. It may be stripped.

Jun 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Garage door opens about one foot and remains there.


Check the door springs. You could have a broken spring. Also remove the cover and check the drive gear. It is a white nylon gear just in front of the motor. It is possibly stripped. This is a good time to release the door from the opener and operate it by hand to see just how heavy it has become.

Jun 29, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door bucks like a bronco


You have a door problem. The reason the door is reversing to the open position is because when it bucks the safety senses something wrong. Release the door from the opener and operate it by hand. You should find something.

Jun 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Remote does not open or close garage door; inside button flashes


What has happened is that you electric eyes are blocked or have gone out. The eyes are at the garage door about a foot of the ground on both sides. There should be a red or green light on one of them. If not some thing is blocking the beam that goes across the door. It is a safety beam so kids can nt get hurt when the door is coming down. If the beam is broke the door will go back up.

Jan 24, 2009 | Chamberlain Powerdrive PD422D 1/2 HP...

1 Answer

I have replaced the gears system in my craftsman 1/2 hp garage door opener. I pushed the button to test the motor and it went up without a hitch. I then went to push the button again and the door went...


Can you adjust the down-travel? On mine, it's a white nylon screw, on the left side, inside the light cover. Seems like there were instructions for this adjustment in the instructions for the gear replacement.

Dec 07, 2008 | Sears Craftsman LiftMaster Chamberlain...

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