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Why Does the Car Air Conditioner Emit Odors When Turned On?

1 Answers

ElliottLee

07/24/25 10:46am

Reasons why the car air conditioner emits odors when turned on: 1. External engine exhaust leaks or foreign objects at the air intake can cause unpleasant odors to enter through the air conditioner's intake. This situation is easy to check—simply open the hood at a repair shop for a clear inspection. 2. The air conditioning filter is too dirty. Regular cleaning and inspection can prevent odors from occurring. 3. Mold growth in the air conditioning ducts and evaporator can also cause odors. This type of repair is more complicated and should be checked by professionals at a 4S shop. Solutions for air conditioner odors: Replace the air conditioning filter. A heavily soiled filter not only fails to perform its original function but also causes secondary pollution to the air entering the car. To completely eliminate odors inside the car, it's essential to address the source. Normally, an original air conditioning filter has a lifespan of one year or 30,000 kilometers. If the vehicle frequently operates in areas with poor air quality, the filter replacement cycle should be shortened accordingly.

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