We can service the new 134 systems and the old R12 systems. Air Conditioning System This system shares air ducts, controls and a blower with the heater, but has its own refrigerant system. The air conditioning system is comprised of the following components: Compressor This is a pump that pressurizes and circulates the refrigerant through the system. Condensor As the refrigerant flows through the condensor, it gives off heat and converts from gas to liquid. Receiver/Dryer or Accumulator This is where clean, dry refrigerant is stored as it circulates through the system. Orifice Tube or Expansion Valve This is a metering device that controls the flow of refrigerant throughout the system. Evaporator Core Refrigerant enters the evaporator core as a liquid. Heat from the air converts the liquid refrigerant back into a gas, which cools the air before it enters your car.