If you have a garage door opener installed on your garage door, read this article on Why Won’t My Garage Door Opener Close? If you don’t have a garage door opener installed, there can be quite a few issues that will result in the door not being able to close. A few quick items to check are: Is the garage door crooked? Is the garage door bowing down in the center? Are there any broken or damaged hinges on the garage door? Is the lifting cable on the garage door loose, disconnected or wrapped around the torsion spring bar? Is the garage door spring broken?
Unfortunately, in most cases it will be necessary to schedule a technician to repair your door and get it safely back down to the ground. Many times when, the garage door is stuck open, it can be unsafe to attempt to lower or force the door to close as this will result in further damage to the garage door and its components as well as risking possible sever injury to both you and your property.