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Joined: Nov 2006
Posts: 3,758
Campfire Tracker
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OP
Campfire Tracker
Joined: Nov 2006
Posts: 3,758 |
I'm trying to troubleshoot a garden variety Liftmaster. The chain sprocket broke so I replaced the sprocket assembly. Now the door goes down less than a foot, then comes back up. The kicker is that the light on the motor doesn't blink at all, like it normally does when there is something blocking the door sensors. The door sensor lights appear to be aligned and functioning correctly. I can't find any information about this. When I search it, every result that comes up is where the motor light does blink when the door won't go down.
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Joined: Dec 2014
Posts: 9,171 Likes: 8
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2014
Posts: 9,171 Likes: 8 |
Do not ever tie a loop or noose in the manual pull rope.
Well this is a fine pickle we're in, should'a listened to Joe McCarthy and George Orwell I guess.
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Joined: Nov 2008
Posts: 8,722 Likes: 6
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2008
Posts: 8,722 Likes: 6 |
Swifty
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Joined: Dec 2004
Posts: 9,743 Likes: 15
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2004
Posts: 9,743 Likes: 15 |
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Joined: Jun 2004
Posts: 34,361 Likes: 10
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 34,361 Likes: 10 |
I would start here as well
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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Joined: Nov 2009
Posts: 15,905 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Nov 2009
Posts: 15,905 Likes: 2 |
I'm not familiar with the Liftmaster, but on some door openers, there is a knob/dial that adjust current settings. If the current draw is above a set point, the door try to close, but will reverse automatically after a foot or so. Sometimes just a dry chain and rollers on the door will cause the problem. Dry chain and rollers cause the door to be harder to open, thus increasing the current draw. Before you adjust anything on the board, take some chain lube and give the chain and rollers a good lubing.
Another common problem is the door was not positioned properly when the chain/sprocket is put on. Did you make sure the door was all the way open or closed, when you put the chain on. If not, the limit/proximity switches, that tell the door when it is open/closed, are not set properly and this could cause this problem.
There's more, but these are the 2 most common.
Old Turd- Deplorable- Unrepentant Murderer- Domestic Violent Extremist
Just "Campfire Riffraff and Trash"
This will be my last post! Flave 1/3/21
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Joined: Nov 2006
Posts: 3,758
Campfire Tracker
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OP
Campfire Tracker
Joined: Nov 2006
Posts: 3,758 |
Thank you for the link and diagnosis Swifty52! I'll adjust the down force screw per the instructions in the link and hopefully that will solve the problem.
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Joined: Jun 2004
Posts: 34,361 Likes: 10
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 34,361 Likes: 10 |
Thank you for the link and diagnosis Swifty52! I'll adjust the down force screw per the instructions in the link and hopefully that will solve the problem. Not force screw, travel screw first
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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Joined: Sep 2010
Posts: 31,442
Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2010
Posts: 31,442 |
You will find there are experts of all subject matter on the 'Fire. It is the ultimate universal brain trust and some specific members know absolutely everything themselves. We are a blessed community. Cumbaya.
"I can't be canceled, because, I don't give a fuuck!" --- Kid Rock 2022
Holocaust Deniers, the ultimate perverted dipchits: Bristoe, TheRealHawkeye, stophel, Ghostinthemachine, anyone else?
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Joined: Nov 2008
Posts: 8,722 Likes: 6
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2008
Posts: 8,722 Likes: 6 |
Thank you for the link and diagnosis Swifty52! I'll adjust the down force screw per the instructions in the link and hopefully that will solve the problem. Not force screw, travel screw first Correct, on mine you can remove the cover and see the operation. On the gear drive it’s practically impossible to get the thing back in the same position as when it busted which means the travel limits are way off. I had no issue with the torque.
Swifty
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Joined: Apr 2003
Posts: 555
Campfire Regular
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Campfire Regular
Joined: Apr 2003
Posts: 555 |
I just got done going through this myself. These are my suggestions:
A. Make sure The garage door can be lifted and lowered smoothly and easily by hand by adjusting the torsion spring and the drum rollers. The drum rollers on each end have to be identical tension.
B. Make sure the travel limiters are adjusted properly.
C. If your Government-mandated safety item reversing sensors are mounted on the track, take them off and mount them permanently to the jam.
My sensors were mounted to the track, and when the door started to move they wobbled just enough to make the door reverse. Once I mounted them solidly to the jam using wooden blocks, the door worked perfectly.
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Joined: Aug 2015
Posts: 869
Campfire Regular
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Campfire Regular
Joined: Aug 2015
Posts: 869 |
Direct sunlight on one or the other eyes can stop the door.
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Joined: Jan 2005
Posts: 2,340
Campfire Regular
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Campfire Regular
Joined: Jan 2005
Posts: 2,340 |
Direct sunlight on one or the other eyes can stop the door. Or, take them off and mount them to a paint stick about an inch apart on the rafter and pay attention that there's nothing under the door when you push the button.
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