Replace a broken gear and sprocket assembly with the manufacturer approved replacement part.
Garage door opener broken chain.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
The gear and sprocket assembly is inside the cover of the garage door opener motor.
The most common cause of a chain being loose and appearing broken is a broken gear and sprocket.
This is a yellow or red rope that hangs from the overhead garage door assembly.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
Step 1 locate the garage door s emergency release rope.
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.
This can be easily replaced by a garage door service technician.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
You can fix your broken door chain regardless of your familiarity with garage door repairs.