While garage door problems can be a hassle, in most cases the issue is one of the following three things:
When Closing, Your Garage Door Falls
When a garage door closes, there are springs in place to allow the door to lower slowly, rather than slamming into the ground. If your garage door is falling shut rather than closing slowly, there is most likely a problem with the garage door extension spring. If this is the case, then the worn springs will need to be replaced.
Your Garage Door Won't Open or Close
If you have an automatic garage door opening, most likely something is off in the programming. If you check your keypad and notice that it is not working, it may need to be reprogrammed. There could also be some frayed wires in the unit. If this is the case, your opener will most likely have to be replaced.
Your Garage Door is Sticking When Opening and Closing
A door that is sticking is, perhaps, the most common and annoying of all possible garage door problems. A partially working garage door is easy to ignore, but also very easy to fix. The metal rollers and hinges on a garage door can become stuck, making it hard for the garage door to open and close. Lubrication will take care of this problem. If this is not the issue, then the tracks that your garage door sits on may be dirty and clogged or misaligned.