In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
Craftsman garage door chain fell off.
Problem is that the door only seems to want to close and it s already closed.
I have a 4 year old craftsman 1 2 hp garage door opener.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor.
The chain fell off the drive so i put it back on and re tightened.
Disconnect the garage door from the opener.
Replace a broken gear and sprocket assembly with the manufacturer approved replacement part.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
Thread the nut s facing the door clockwise until it meets the bracket then release the chain.
This will release the door from the garage door opener.
Once you locate where the wheels on the door are jumping.
To reinstall the chain on the sprocket first with the door closed pull the rope hanging down from the trolley on the t bar.
If you find that your garage door opener chain falls off the track on which it has been placed you will need to put it back up and then tighten the chain to stop this happening in the future.
Open the door manually.
Reach overhead and pull the rope that releases the door from the opener.
Pull the chain toward the garage door and hold it in position.
Pull down the trolley cord to release the trolley from the chain arm and lower the door by hand.
The chain is attached to a threaded rod that is attached to the trolley.
Press down on the chain with your finger.
The chain moves about 6 inches trying to close again and stops.
Every time you push the.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.