What Causes Odor When Turning on the Car Air Conditioner?
2 Answers
Reasons for odor when turning on the air conditioner inside the car: 1. Mold growth on the air conditioner evaporator, where bacteria gather and multiply. 2. The air conditioner filter has not been replaced for a long time. If this occurs, it is recommended that the owner replace the air conditioner filter or clean it thoroughly. Here is some related information: 1. The main function of the air conditioner filter is to filter out impurities such as dust and pollen from the air, ensuring that only clean air enters the car. 2. The air conditioner filter not only maintains a clean environment inside the car but also benefits human health. 3. Without an air conditioner filter, pollen in the air can enter the car. For those allergic to pollen, inhaling it can trigger allergic reactions, leading to difficulty breathing, lung damage, and even irritability, which can affect driving mood and increase the risk of accidents. 4. Car owners should regularly clean and replace the air conditioner filter to ensure it functions properly.
I've encountered the issue of unpleasant smells from the air conditioning several times over more than a decade of driving, mostly due to mold growth inside the AC system. The evaporator in the car tends to accumulate moisture during the transition between cooling and heating, especially when the AC is turned off abruptly after parking in summer, leaving residual moisture that becomes a breeding ground for bacteria and mold. If the cabin air filter hasn't been replaced for too long, it can also become saturated with dust and grime, naturally causing the air blowing out to carry odors. External factors can contribute too, such as parking under trees where leaves or small insects might enter the air intake, leading to foul smells over time. The solution isn't too difficult—regularly cleaning or replacing the filter and getting an annual AC system cleaning can prevent this. Remember to turn off the AC a few minutes before parking to let the system dry out, which helps reduce moisture buildup.
