What is the primary purpose of an A/C evaporator?

What is the primary purpose of an A/C evaporator?

• A. Dehumidify
• B. Cool
• C. Clean air entering passenger compartment
• D. Remove pollen

Answer: (B)

The evaporator’s job is to cool the cabin air by absorbing heat from it into the refrigerant as it boils inside the coil. When the warm cabin air blows across the cold evaporator, heat flows into the refrigerant, lowering the air temperature that is returned to the cabin. Humidity is reduced as moisture condenses on the cold surface, which is a helpful side effect of cooling, but the primary purpose is to lower the air temperature. It isn’t responsible for cleaning the air or removing pollen—that function comes from filters in the system, not the evaporator itself.

The evaporator’s job is to cool the cabin air by absorbing heat from it into the refrigerant as it boils inside the coil. When the warm cabin air blows across the cold evaporator, heat flows into the refrigerant, lowering the air temperature that is returned to the cabin. Humidity is reduced as moisture condenses on the cold surface, which is a helpful side effect of cooling, but the primary purpose is to lower the air temperature. It isn’t responsible for cleaning the air or removing pollen—that function comes from filters in the system, not the evaporator itself.