Why does the Honda CR-V's air conditioner emit a pungent chemical smell when first turned on?
2 Answers
Here are the reasons for the odor in the car's air conditioner: dirt inside the evaporator and uncleaned air filter. Dirt inside the evaporator: The evaporator is a key component of the air conditioning system for cooling. During the cooling process, as it comes into contact with external air—especially in large cities or industrial areas where the air is more polluted—it can easily draw dirt and dust into the air conditioning circulation system, leading to odors. Uncleaned air filter: The primary function of the air filter is to filter the air. After prolonged use, it can accumulate dirt. If not cleaned or replaced for a long time, it is prone to producing odors.
My Honda CR-V has been in use for almost a decade, and I can't stand the chemical-like pungent smell whenever I turn on the AC. Usually, it's because the cabin air filter is too dirty, accumulating a lot of dust and bacteria, combined with the damp environment around the evaporator that's prone to mold growth. That smell resembles chemical residues, likely caused by mold due to prolonged AC use without proper drying or contamination in the system. I've tried checking it myself—the filter is located behind the glove box, and simply replacing it with a new one can alleviate most of the odor. If the smell persists, it's best to have a professional clean the entire AC system with specialized equipment and check if there's a refrigerant leak or issues with the pipes. Remember to let the fan run for a few minutes before turning off the AC to dry the evaporator, and replacing the filter every season can also help prevent this. Don't underestimate these odors—inhaling them too much can be harmful to your respiratory system.
