The evaporator is a crucial part of your car's air conditioning (AC) system. It is a heat exchanger that absorbs heat from the cabin air, causing the refrigerant inside to evaporate and cool the air before it is circulated throughout the vehicle. When the AC system is running, the low-pressure refrigerant flows into the evaporator. As warm cabin air passes over the evaporator's fins, the heat from the air is transferred to the refrigerant. This heat transfer causes the refrigerant to change from a liquid to a gas (evaporate). This process effectively removes heat and moisture from the cabin air, providing a cool and comfortable environment for occupants. A functioning evaporator is essential for the overall performance and efficiency of your vehicle's air conditioning.