In an A/C system, what is typically responsible for managing the climate inside the vehicle?

The blower motor plays a crucial role in managing the climate inside a vehicle by facilitating the movement of air through the heating, ventilation, and air conditioning (HVAC) system. It generates airflow by drawing in air from the outside or recirculating air from inside the vehicle, pushing it across the evaporator or heater core to either cool or warm the cabin.

When the air conditioning system is turned on, the blower motor operates to circulate the conditioned air, which is essential for maintaining a comfortable temperature inside the vehicle. Additionally, it helps regulate humidity by enabling proper air exchange, which can prevent fogging on windows and ensure a pleasant driving environment.

In contrast, while the expansion valve controls the flow of refrigerant in the system and is essential for the cooling process, it does not directly manage the climate by moving air. The thermostat sensor monitors the temperature, but it also does not actively circulate air; it simply provides feedback to the system to maintain a set temperature. The refrigerant level is important for system performance but is not involved in climate control management.