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What is the difference between A and M on the car air conditioner?

1 Answers

EllaDella

07/29/25 4:12pm

When the A light is on in the car air conditioner, it indicates automatic mode, and when the M light is on, it indicates forced internal circulation. There are two types of circulation in the car air conditioner: 1. External circulation: In this state, the car air conditioner uses a fan to draw air from outside the vehicle into the cabin. The main feature of external circulation is that it maintains the freshness of the air inside the car. 2. Internal circulation: Internal circulation is a state of the car air conditioning system. In this state, the air exchange channels between the inside and outside of the car are closed. When the fan is off, the air inside the car does not circulate, and when the fan is on, the air drawn in comes only from inside the car, creating an internal airflow circulation. Internal circulation can improve the effectiveness of the air conditioner, as it recools the already cooled air inside the cabin, making the air conditioning more efficient.

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