If you have a garage, you’ve probably experienced the frustration of a garage door that won’t open. For many people, the garage is the only place to work on their cars, so having a garage door that won’t open is a major inconvenience. But what causes garage doors to break down? It could be anything from a loose hinge, to a worn-out spring, to a broken opener. Whatever the problem may be, you’ll need to repair your garage door properly so that it opens and closes smoothly.