Why does the Cadillac CT5 air conditioning have a pungent smell?
2 Answers
Cadillac CT5 air conditioning has a pungent smell for the following reasons: Air filter odor: The car air filter can not only filter dust but also absorb odors. If it is not replaced for a long time, not only will the airflow decrease, but the odor will also become increasingly strong. Air duct odor: The air duct can also absorb dust. If the external circulation is frequently used, small airflow can absorb many dust particles. Interior air odor: Odors caused by moldy cigarette butts or spoiled food inside the car. Air conditioning evaporator: Due to the large working temperature difference, condensation is prone to form inside the air conditioning evaporator. Over time, this can lead to mold growth, resulting in a certain odor when the air conditioning is turned on.
I also encountered a pungent smell from the AC when I first drove my Cadillac CT5, which was quite annoying. It’s mostly due to the AC filter accumulating too much dust, pollen, or mold, which can develop a musty odor over time—especially noticeable on rainy or humid days. The evaporator might also harbor mold if not cleaned properly, with residual condensation breeding bacteria that produce a sour stench. Additionally, debris like dead leaves rotting in the ducts or refrigerant leaks releasing chemical odors could be the culprit. I make sure to clean the system regularly and replace the AC filter without delay—waiting over a month worsens the smell and even risks health issues like rhinitis or allergies. A professional shop cleaning costs just a couple hundred bucks, way better than putting up with it.
