Chain drive garage door openers have a sprocket that is attached at the top of the motor.
Fix garage door chain.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor.
How to fix a chain drive garage door when it won t open.
Press down on the chain with your finger.
Garage door opener is very strong and seldom does the chain actually break.
A garage door opener chain may make a lot of noise when you pull it to open your door but it is one of the most reliable types of door openers ever invented.
Pull the chain toward the garage door and hold it in position.
Sometimes the cable will break if it is a combination chain and cable drive system.
You should have 1 2 inch of play in the chain.
For many generations people rely on this type of door opener not only because it is easy to use but also because it is cheap and can easily be repaired when broken.