Move the ladder to the outer end of the chain arm near the garage door.
How to fix garage door chain came off.
Thread the nut s facing the door clockwise until it meets the bracket then release the chain.
A new front sprocket costs.
Another common cause for a loose chain could be the front sprocket breaking.
You should have 1 2 inch of play in the chain.
Sprocket is at the end of the opener rail closest to the garage door opening.
Around this sprocket as well as the gear and sprocket at the motor.
Press down on the chain with your finger.
Pull the chain toward the garage door and hold it in position.
Tighten or loosen the chain as needed by adjusting the nuts.
Once you have done this you can then tighten your garage door opener chain.