What Causes the Foul Smell When the Car Air Conditioner is Running?

1 Answers
StCharlie
07/29/25 1:53pm
Reasons for the foul smell when the car air conditioner is running: dirty air conditioning ventilation ducts, dirty air filters, or damp and moldy air conditioning evaporators. After prolonged use of the car air conditioner, external air enters the car interior through the air conditioning filter and evaporator. Over time, the accumulation of dust and debris can block the air vents, reducing cooling efficiency. The warm and damp evaporator area becomes a breeding ground for mold and bacteria, leading to foul odors. The car air conditioner refers to the air conditioning device installed in the car, which can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety.
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