Garage Door Opener Problem

[holdem]

So I have a Liftmaster garage door opener that I'm having trouble with. It was running but the door wasn't moving. I opened the cover and discovered that the gear was broken. I replaced the gear. Now the door goes down and gets to about an inch or two of the ground and then goes right back up. I have turned the adjustment screw to make the door go down further but that didn't help. Any ideas? Thank you.

 

[ns09]

I think you might try increasing the down pressure adjustment or look for something breaking the line of sight between the safety lights.

 

[DonTom]

So I have a Liftmaster garage door opener that I'm having trouble with. It was running but the door wasn't moving. I opened the cover and discovered that the gear was broken. I replaced the gear. Now the door goes down and gets to about an inch or two of the ground and then goes right back up. I have turned the adjustment screw to make the door go down further but that didn't help. Any ideas? Thank you.

You mean the two white nylon /plastic  gears inside? Did you replace both? If one of them is damaged at a certain area, that's what happens, door  will reverse as soon as it gets to the damaged area on the gear.

It happened to one of my door openers, also a LiftMaster.  Replacing the two plastic gears fixed it. So I am wondering if your "broken" gear damaged the other and stripped it a little.

BTW, I know there many are different models of Liftmaster, but that was the problem with mine.
Anyway, check the other gears for any damage.

-Don-  Auburn, CA

 

[aguablanco]

You need to re center the limits. Then reset them for proper travel. PM me if you are still having issues.
RichH
Retired Garage Door Contractor.

 

[Tin man1]

I don't know what model you have, but I have a lift master and it was a nightmare.  I replaced the boards there are 2. Twice. Lift master replace the whole unit. Since the new unit was installed I had to replace one of the boards again.  I told them that I could work for them with all the time I spent on the ladder.  I have a feeling it is a temperature problem. When the temp. Drops the motor acts up. Comes down and stops and goes back up. Starts going down and goes back up.
I replaced the motor this spring and now waiting for the temperature to drop.

I am traveling, and hope to be home Saturday. PA

 

[SpencerPJ]

I agree with the 'retired Garage door contractor'  )