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Why is there vapor coming out of the AC in the car?
I’ve noticed some weird steam or mist coming out of my AC vents. It doesn’t have a strong smell but I am a little concerned. Why is there vapor coming out of the AC in the car?
Bonnie Stinson · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Vapor coming out of the AC vents in your car is usually the result of excess water that has built up inside the AC system.
One possible cause is that the drain vent is plugged or water has built up in the heater box. In this situation, this water may condense and then be blown by the fan into the car. You should smell a musty but otherwise odorless scent. To solve this, clean the drain hole.
Another possible cause is an antifreeze leak—but before you panic, note that you should be able to smell an antifreeze leak. If you don’t smell something slightly sweet, it’s probably not vaporized antifreeze.
If you’re unsure how to rectify the problem, bring your vehicle to an auto shop for an inspection.
While waiting for the mechanic, use the
Jerry
app to ensure you’re happy with your car insurance
coverage. Add extra protection, compare rates, or switch to a cheaper policy. View full answer
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