Disconnect the power supply and disengage the opener.
Garage door opener chain hanging down.
There s usually a piece of rope hanging from it which is used to disengage and re engage the opener.
The trolley is responsible for pushing or pulling the opener arm along the chain so as to open and close the garage door.
If the door seems okay there may be a problem with the trolley or the opener itself.
Disengage the garage door from the opener by pulling down on the emergency pull cord to release the door trolley.
How to put a chain back on an automatic garage door opener step 1.
If you watch the chain on your opener one side hangs in the up direction and the opposite side hangs going down.
Liftmaster and chamberlain are popular garage door openers with chains.
Now is a good time to take a look at the sprocket on top of the motor unit.
Press the wall control button or remote so that the opener completes its close cycle and the sprocket on.
The garage door opener loose chain or tight chain can be an easy diy.
That is usually an indicator of wear in the worm gear sprocket drive assemblies.
The chain may also have come off due to too much play in the sprocket on the overhead opener.