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A garage door has two critical components, such as the opener and the door. Overhead doors of the garage may swing up in a piece or roll up in small sections. These doors operate on the tension of spring. Garage doors move on metal tracks and get power from heavy springs. In numerous cases, the door may not work efficiently. To fix these doors, you have to repair them. Here are some easy repair tips: Check all the metal tracks in the garage. Evaluate the mounting brackets holding the tracks to walls.