Driver habit causes car AC odor; simple steps prevent mildew

Moisture that accumulates on the evaporator of a car’s air‑conditioning system can create an environment for bacteria and mold, leading to an unpleasant odor from the vents, especially after the vehicle has been parked in the heat. Experts advise turning off the A/C a minute before the end of the drive while keeping the fan running to dry the system, replacing the cabin filter according to the manufacturer’s schedule, avoiding full‑blast cooling in a hot car by first opening windows to vent hot air, and performing a thorough cleaning and disinfection if the smell persists.

Following these low‑cost habits can extend the life of the climate‑control system and improve cabin air quality.