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What to Do When the Car Air Conditioner Has an Earthy Smell?

2 Answers

PaigeRose

07/24/25 7:00am

If your car air conditioner has an earthy smell, you can drive the car under the sun, set the air conditioning system to warm air mode, turn the fan to the maximum speed, and let it sit for more than ten minutes with all doors and windows open. If the issue persists, it may be due to a dirty cabin air filter, which needs replacement. If necessary, the air conditioning system can be cleaned. Here are some tips for using the car air conditioner: 1. Open windows before turning on the air conditioner: In summer, do not immediately enter a car that has been exposed to the sun, or if you do, avoid turning on the air conditioner right away. First, open all windows and doors, then turn on the fan to accelerate air circulation. After a few minutes, close the windows and doors and turn on the air conditioner. This helps release toxic substances and cools the car interior quickly. 2. Direct the airflow diagonally upward: This utilizes the principle that hot air rises and cold air sinks, allowing the cold air to cool the car from top to bottom. 3. Switch between internal and external circulation: Choose based on the vehicle's environment. For example, if the car is stuck in traffic in a busy urban area, use the internal circulation function to prevent exhaust fumes from entering the car and keep the interior air clean.

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DiFaith

08/11/25 2:42am

I've also encountered the issue of a musty smell in my car's air conditioning, which smells like freshly turned soil, and it's quite annoying. It's mostly due to a dirty or moldy air filter, as high humidity can easily breed bacteria, and prolonged neglect can release odors. Last time, I replaced the filter myself by opening the glove compartment, locating the rectangular filter, removing the old one, and installing the new one—the whole process took about ten minutes. When cleaning, it's best to spray the ducts with a neutral cleaner to prevent mold buildup. It's recommended to replace the filter every six months and ventilate the car more often during spring and autumn, which keeps the air fresh and reduces allergy risks. Proper maintenance not only saves on repair costs but also makes driving much more comfortable.

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