Repairing a garage door cannot be designed if you do not fully understand its components and mechanism. This is why the first step in preparing for this repair is to acquire basic knowledge. You need to become familiar with the different parts of the door, which can be primarily delegated to either a moving or stationary part. However, in general terms, the door can be separated into two significant components: the opener and the open door. In addition, you need to know the mechanics of the door, which includes moving the door on metal tracks by guiding substantial garage door springs. Understanding the particular subtleties of this mechanism may be necessary for some garage repair cases.