Five Reasons Odors Come from Your Vents

December 30, 2020 7:50 pm Published by Leave your thoughts

Turning your car’s heat on is a reprieve from the brutal winter winds. It should provide nearly instant relief, and without producing a nasty smell that makes you cough or gag. Unfortunately, smells coming from car AC vents in New Palestine, IN is a fairly common issue, and there are a few reasons why. This post will cover a few of the main causes of those smells and how you can remedy them.


Vehicle vents are hotbeds for mold, mildew and bacteria growth due to water droplets that come from the air conditioning system. While this doesn’t hinder the system’s functionality, the mold does cause an unpleasant odor when you run the heat or AC. See a professional when that dank and musty odor becomes unbearable. Your mechanic can clean out the system and remove the mold and subsequent smell.

Gas leak

Needless to say, a gas smell coming from your AC vents every time you turn on your car isn’t normal. It’s an indication that something isn’t just wrong with your heating or AC system, but that your vehicle has a gas leak. The leak could be coming from the fuel pressure regulator, fuel injector or even the muffler. You’ll want to bring your vehicle to a mechanic right away to find the source of the leak and stop it.


A sweet smell coming from your vents might not be as nauseating as gasoline, but it’s just as serious! The sweet smell could be caused by an antifreeze leak in the cooling system, which necessitates a professional repair. See a mechanic as soon as you notice the smell, because it won’t go away on its own and it’ll likely only get worse!

Dirty air filters

As they age, dirty air filters can cause nasty odors coming from car vents in New Palestine, IN. All of the dirt, dust, stagnant water droplets and other pollutants can make your car reek every time you turn on the AC or heat. Changing air filters is something many vehicle owners can do on their own. However, it’s never a bad idea to bring your vehicle to a pro. We’ll perform a thorough inspection of your system after changing your filters.

Decaying animals

Squirrels, chipmunks, mice and other rodents are known to make nests inside vehicles that don’t get a ton of use. After all, it’s a warm spot away from the elements and any predators. These pests wreak havoc on electrical systems by chewing wires. And if they die in there, the smells will be horrific as they decompose. Fortunately, the smells coming from car AC vents in New Palestine, IN will go away after the carcass is removed.

Let us fix your smelly vehicle

If you’re tired of driving around in a smelly car, come to Auto Air & Heating, Inc. As our name suggests, we’re experts in all things related to vehicle heating and air conditioning. Regardless of why you have odors coming from your car vents in New Palestine, IN, our team of experts is equipped to remedy it!

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