Does the AC also turn on when the car's automatic air conditioning is set to warm air?

[SanEvelyn]

When using the car's automatic air conditioning for warm air, the AC does not need to be turned on. This is because the car's heating system utilizes the heat generated by the engine to produce warm air, achieving the heating effect. The AC is the cooling switch for the car's air conditioning. Precautions to take when using the car's heater: 1. Avoid directing the warm air straight at the head, as prolonged exposure can cause driver fatigue and affect driving safety; 2. Never leave the heater on continuously while sleeping in the car, as this can easily lead to carbon monoxide poisoning; 3. When the heater is on, the car becomes an enclosed space, creating an ideal environment for bacteria to grow and spread. If someone smokes in the car, the amine and nicotine in the smoke can adhere to the surface of the evaporator. Under conditions where the air conditioning is not frequently used or during rainy weather, bacteria can proliferate extensively on the evaporator surface, leading to air pollution inside the car when the air conditioning is turned on again.