The 3-minute rule for car air conditioning refers to the practice of turning off the AC compressor while keeping the blower running a few minutes before reaching the destination. Specifically, after turning off the AC, the blower will continue to dry the condensed water remaining on the surface of the evaporator, preventing mold growth in the humid environment that causes odors, and reducing the risk of bacterial proliferation in the ducts. This operation also lowers the probability of initial odors when the air conditioner is next turned on, helps maintain the cleanliness of the evaporator, and extends the lifespan of the air conditioning system. When using the heater for defogging during rainy seasons or in high-humidity environments, It is best to keep the AC function activated to maintain the dehumidification effect. In daily use, you can also combine this with the habit of running the AC compressor at least once a month (even in winter) to prevent the aging of the sealing rings, and replace the air conditioning filter regularly (recommended every year or 20,000 kilometres). These measures collectively enhance the efficiency of the air conditioning system and improve the air quality inside the vehicle.
