Should the AUTO Air Conditioning Be Turned Off Before Shutting Down the Engine?

[AndersonAnn]

AUTO air conditioning should be turned off before shutting down the engine. Here is the relevant information: 1. Reason: After the air conditioning is turned on, moisture in the air will condense on the surface of the evaporator, making it damp and cold. Moreover, mold in the air will adhere to the surface, and over time, the evaporator surface becomes a breeding ground for bacteria, which multiply rapidly and produce foul-smelling metabolites and gases. This is why a sour smell is emitted when the air conditioning is turned on. 2. A/C Indicator: There is an A/C indicator on the right, which stands for the compressor. In summer, cooling is required, so the compressor must be turned on, and it usually starts automatically. In winter, it can be left off, as hot air can be obtained once the car's water temperature rises. Not turning on the compressor in winter can also save fuel.