Posted on 3/28/2025
A musty smell coming from your car’s air conditioning system can make every drive unpleasant. If turning on the AC fills your cabin with a damp, moldy odor, there’s likely an issue with moisture buildup, bacteria, or even a clogged filter. Ignoring the problem can lead to worsening air quality and potential health concerns. Let’s break down the common causes of this issue and what you can do to fix it. 1. Mold and Mildew Growth in the AC System One of the most common reasons for a musty smell is mold and mildew buildup inside the air conditioning system. When moisture lingers in the evaporator core or air ducts, it creates the perfect environment for mold to grow. This often happens if: You frequently use the AC in humid conditions Water isn’t draining properly from the system Your car sits unused for long periods with moisture trapped inside A professional cleaning of your AC system, including the evaporator coil and ducts, can help elimin ... read more