The main objective behind the design of a hard start kit is to assist the compressor on start-up. For an inside air conditioning coil located more than 50 feet from the outside condensing unit, you may need a hard start kit that will assist your compressor during its turn-on period. The working of your air conditioner is like a pump that circulates the refrigerant throughout your system. If the pump has low efficiency, it will need to work hard and will have more chances of breaking down. When your air conditioner first starts up and begins the pumping process, it needs the most help. A hard start kit helps the air conditioner at that moment. A hard start kit is added to extend the life of the compressor and it can save you from the huge cost of a repair or replacement.