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

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Garage door only goes up a foot but it goes down

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You probably have a broken spring on your door

Posted on Jan 18, 2009

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Garage door goes down a foot and goes back up. light by learn button flashes five times


That light is sending the code for RPM sensor or motor overload. Most likely it is the RPM sensor which is a small circuit board just in front of the motor. The part number is 41C4398A and is available at any good door opener service company.

Feb 06, 2011 | Sears Craftsman LiftMaster Chamberlain...

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Garage door goes up fine but when you press to come down it goes down one foot, seems like it hits something and returns.


There is a sensor which checks for obstructions, are you sure there is nothing impeding drive path?Inspect the drive path carefully. If it reaches a part of the drive path which causes it to slip or stick slightly this will tell it not to continue. Also but less likely have you checked that the optical sensor is clean and aligned. Make sure there is nothing blocking the optics.

Jan 17, 2011 | liftmaster Garage Door 1/2 Hp

2 Answers

My older Craftsman garage door opener comes down about 6" & then goes back up. I just replaced all the rollers o& the opener worked fine. Then I tightened the chain on the opener & it worked ok...


If the main light flashes 10 times when the door goes back up it is a door sensor problem. You chain should sag just a little. If you tighten it too much it will click as it goes over the sprocket. You can increase the down force which is an adjustment near where all those white wires go. A 1/4 turn should be enough. Release the door from the opener and operate it by hand. It should move freely and when you have the door approximately waist high it should stay put. Neither raising nor closing.

Jan 11, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Wanye dalton door opener modal 3018. goes up 1 foot and stops


Check your door springs. Usually just over the door and can be seen when the door is closed. A broken spring is the most common cause of this problem.

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

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Worked great the past 2 years. Now, garage door


Remove the cover and take a look at the drive gear. It is white nylon and is just in front of the motor. Most likely stripped.

Jul 14, 2009 | Sears Craftsman LiftMaster Chamberlain...

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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

3.75 craftman garage door goes down a foot then immediately reverses back up


If when it does this your main light flashes 10 times it is the door sensors. Make sure they are aligned properly. If the main light doesn't flash 10 times then you most likely have a bad RPM sensor board. It is a small printed circuit board just in front of the motor.

Jun 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

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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...

1 Answer

Garrage door opener ability to close the garrage door


HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.
WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.

ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH OTHER?

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

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