Cabin Air Quality - Fluids, Leaks & Smells Symptoms
Common symptoms and diagnostic guides.
Smell stronger when AC is off
Unpleasant odors that seem stronger when the AC is off are usually caused by mold, bacteria, or trapped smells in the HVAC system or cabin, becoming more noticeable without airflow.
Smell worse after open window
Unpleasant odors that seem stronger when you open a window often originate from trapped cabin smells, HVAC system issues, or exhaust/air leaks; diagnosing quickly improves comfort and safety.