Your automobile Air Conditioning System is divided into two sides, known as the high side and the low side. The compressor, beginning at the high side, functions like a pump, moving the refrigerant through the system. The expansion valve, which begins at the low side, restricts the refrigerant flow, creating the pressure differential the system needs to ensure the increase and decrease in temperature and boiling point. There are a number of possible reasons why your A/C system is not cooling properly. Midas has developed a state-of-the-art, multi-point diagnostic test for A/C systems. Select stores are equipped to check for leaks and repair A/C systems from all major manufacturers.