What does the car air conditioning recirculation light indicate?

[MacEmilia]

The illuminated recirculation light indicates that the air conditioning system is in recirculation mode. In this state, the vehicle's air conditioning operates in internal circulation. Most car air conditioning systems feature both internal and external circulation functions. When internal circulation is activated, outside air cannot enter the vehicle cabin. Conversely, when external circulation is enabled, outside air can flow into the cabin. Here's additional information: 1. Car Air Conditioning: This is a crucial comfort feature in vehicles, used almost daily during winter or summer. 2. Air Conditioning Principle: The system can provide both cooling and heating. The cooling mechanism is relatively simple: during cooling, the compressor clutch engages, allowing the engine to drive the compressor. The compressor then continuously compresses refrigerant and delivers it to the evaporator. Inside the evaporator, the refrigerant expands and absorbs heat, cooling the evaporator. This cooled evaporator then chills the air blown by the blower, resulting in cool air being emitted from the air conditioning vents.