First of all if you need to repair garage door , you will need to know the Garage Door Components:

• Door Panels
• Springs
• Counterbalance System
• Roller
• Hinges
• Opener

Each one of this list can be broke or will need to replace with time, garage door part cat rusted and snap with time , as a daily use of the garage door as the main door for our houses, it will need you attention some time here and there.

Garage Door Counterbalance System & Springs

The roller door has a weight counter balance mechanism. Metal doors are heavy. The counterbalance aids the opener to operate without excessive strain on opening and closing. This mechanism it attached to the door via steel cabling. It has a drum that the cabling wraps around and the drum in turn is coupled to a wound-up coil spring. The spring tension counter balances the weight of the door. But the springs sometimes fail and need replacing.

Another area of mechanical break down is the rollers. The rollers hold the door in position and follow the tracks allowing the panels to articulate and follow the tracks. These like all mechanical things require maintenance. Depending on usage these require lubrication at least once a year. If the rollers fail or bind the door may or may not open or close. The rollers wear and require replacement, should last 10-20 years with proper care.