If you find that any aspect of your garage door is in need of repair, calling a reliable garage door company is the best decision you can make. Of course, this probably isn’t going to stop you from taking a closer look yourself.
My garage door won’t open and close? There are many reasons for this – some of which you may be able to diagnose on your own. If you don’t see a problem on the surface, such as a broken spring, there may be something wrong with the electrical components of your door. Either way, these are problems that you probably won’t be able to fix on your own.
If your garage door is sticking from time to time you may be able to solve the issue with a little bit of lubricant. This is one fix that you can handle on your own.
Not all garage door repairs are for a professional – just most of them!
source: http://ezinearticles.com/?Garage-Door-Repair—Simple-Fixes-You-Can-Do&id=4651538