Every time your garage door goes up and down, take a minute to think about how amazing it is that you don't have to open this huge door yourself. Garage doors are really heavy, so having an automatic opener really makes life easier — and safer. There is a lot to know about garage doors and the mechanisms that open them. Even if you don't plan on becoming an expert, you should understand a little about how your door works, how to care for it, and when you may need to call for professional repairs. That level of understanding can be gained right here on this website.