Your car's A/C Evaporator is located inside your vehicle and serves as the absorption component of your climate control system.

The primary function of the A/C Evaporator is to remove heat from the inside of your vehicle. A benefit of its operation, however, is dehumidification. As warmer air travels through the aluminum fins of the colder evaporator coil, the moisture contained in the air condenses on its surface. In addition, dust and pollen passing through the evaporator stick to its wet surfaces and drain off to the outside. If you run your air conditioner on humid days you may have noticed water dripping underneath your car. This is perfectly normal.

The ideal temperature of the evaporator is 32° Fahrenheit or 0° Celsius. Refrigerant enters the bottom of the evaporator as a low pressure liquid. The warm air passing through the evaporator fins causes the refrigerant to boil (refrigerants have very low boiling points). As the refrigerant begins to boil, it can absorb large amounts of heat. This heat is then carried off with the refrigerant to the outside of the vehicle. Several other components work in conjunction with the evaporator.