The trolley moves along the chain drive the long track attached to the ceiling when the garage door is opening or closing attached via a metal bar to the inside top of the garage door.
Garage door is stuck shut.
A door that is stuck halfway open is a security risk allowing access to the garage and the home if it.
Even with regular maintenance garage doors can sometimes stick refusing to open or close.
When attempting to fix a garage door that is stuck open make sure to turn the garage door opener off.
Some garage doors have a full lock system which enables you or anybody to lock your garage door from the outside by only turning the handle.
Keeping the garage door closed is important to home security so life can become pretty stressful when that door can t seem to stay shut in your efforts to get your home safely sealed up again.
Because of the potential danger of broken parts you should inspect the garage door for damage before attempting to close it.
However if you encounter resistance stop.
When you know there is no damage to the door you can close the garage door by disconnecting the door from the electric opener.
You can view this video on how to safely open your garage door with no power here.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
An electric garage door can become stuck in the open position for several reasons.
If it is possible to safely pull the garage door manually to a closed position before attempting any repair do so.
Surprisingly your garage door just being locked can be causing your problem.