If you watch the chain on your opener one side hangs in the up direction and the opposite side hangs going down.
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.
How to put a chain back on an automatic garage door opener step 1.
If the door seems okay there may be a problem with the trolley or the opener itself.
This could be causing your chain to seem to have grown.
Press the wall control button or remote so that the opener completes its close cycle and the sprocket on.
The trolley is responsible for pushing or pulling the opener arm along the chain so as to open and close the garage door.
Now is a good time to take a look at the sprocket on top of the motor unit.
Disengage the garage door from the opener by pulling down on the emergency pull cord to release the door trolley.
The garage door opener loose chain or tight chain can be an easy diy.
It has a bronze bearing that wears over time and lets the sprocket lean forward.
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Liftmaster and chamberlain are popular garage door openers with chains.