If the gear is worn or damaged the door won t move properly.
Garage door sprocket not turning.
How to fix a chain drive garage door when it won t open.
2 if it is getting power then disconnect the door and then see if the chain will move.
The plastic gear on the drive shaft is designed to fail if the garage door gets stuck in the travel tracks protecting the expensive drive motor from damage.
Simply push the button and see if the light comes on.
Having an automatic door opener in your garage is a great convenience but you have to give the opener and all its parts regular.
This speed reduction system also increases the motor torque at the sprocket so that a relatively small motor can easily pull the chain and move the garage door up and down.
Getting out of the car at the end of a long day to open the garage door can be frustrating especially when the automatic garage door opener sounds like it s working but isn t.
Inside the garage door opener there is going to be a gear reduction system to adapt the motor speed to the chain sprocket speed.
So if you suddenly find that the motor on your garage door opener sounds like it s running but the door is not moving checking for worn gears is the first thing you should do.
As a result of the worn gear the sprocket cannot turn the chain and the door will not open nor close.
The most common issue that occurs is when the ridges in the gear wear out because the gear lubrication has evaporated.
This turns the chain and moves the door.
There are a number of reasons why the motor will run but the chain doesn t move.
As the drive shaft and sprocket rotate they drive the trolley that lifts and lowers the garage door.
However if you hear the motor turning skip to step 5.
Shredded plastic gears are a common problem with chain driven garage door openers.