Why Does My Garage Door Only Open a Few Inches, Then Stop and Go Back Down? If the garage door opens a few inches and then stops, it's usually because the spring assembly is not working properly. If the springs aren't adjusted correctly, the opener has too much weight to handle.
Most garage doors are typically made from either wood, steel or fibreglass. Steel garage doors are cheap to both manufacture and install, making them an ideal choice for those on a budget.
If the green light is flashing or is not illuminated, there's a problem with your sensor. You can test your garage door sensors by placing a cardboard box that's over 6 inches tall in the way of the sensors. If the door closes fully on the box, your sensors are not working and this issue must be addressed immediately.