Which system controls temperature, humidity, and air flow inside the vehicle?

• A. HVAC System
• B. Lighting System
• C. Charging System
• D. Instrument Cluster

Answer: (A)

The system that handles interior climate is the HVAC system. It regulates cabin temperature by mixing heated air from the heater with cooled air from the air conditioner, with a blower moving that air through the vents. It also manages humidity by removing moisture from the air as it passes through the evaporator, which helps prevent window fogging. The system controls where the air goes (dash vents, floor, defrost) and how strong it is, and it can switch between bringing in outside air and recirculating cabin air to maintain comfort and efficiency. Lighting, charging, and the instrument cluster serve different roles—lighting provides illumination, the charging system powers electrical components, and the instrument cluster displays gauges and information.