Why Is Debris Coming Out Of Air Vent In Car?

Why Is Debris Coming Out Of Air Vent In Car?

In the 1940s, Packard came with a car’s first factory-installed Air conditioning. Ever since then, the comfort inside a vehicle is been evolving. Nowadays, air conditioning inside a vehicle is a must to have in this scorching hot environment, and as a matter of fact, you can not buy a new car without air conditioning in the US.

As it happens, we all love cold air flowing throughout the car and making the ride comfortable, but something other than the air coming out of your air vent could be frustrating and make your driving experience a bummer. 

So, when you see any debris coming out of your air vent, you may get panicked and wonder, Why is debris coming out of air vent in my car?

It’s possible that what you’re observing is the result of this foam deteriorating. Also, there could be other reasons behind it, which we will discuss now in this article.

So keep reading.

Reasons Why debris coming out of air vent in a car? And fixes

There are multiple reasons why debris can come out of the air vents. Let’s find out the reasons why and try to fix them:

1. Insulation Foam Pieces

Cars usually use insulation foam to regulate temperature and reduce noise inside the car. 

However, this insulation foam inside can deteriorate if it gets old enough, which causes black foam to break off and come through the air vents.

Also, Sometimes pests like mice or rats can chew on this black insulation foam, which can cause it to break apart and flow through the vents.

Fix: Try blowing the air conditioning at full speed, let all the deteriorated foam pieces come through the vent at once, and clean the interior afterward.

If this method doesn’t work, you can apply the DIY method by opening the AC vent and cleaning it to cut the cost, but if you are not comfortable with it, get professional help and clean the air vent thoroughly so there are no pieces of foam left.

2. Accumulated Dust and Debris 

Although your car’s air conditioning works on reconditioning most of the existing air inside the car, some air does get collected through the space below the windshield area. So when your car’s air conditioning works, it gathers dust, dirt, and tiny particles from outside, and they can build up over time, creating a layer of dirt. 

Debris starts to come through the air vent when this happens, as vents get dirty quickly if you don’t clean and maintain them properly.

Fix: You can follow these steps to clean the air vents:

Step 1 – Cleaning up the Vents 

To start, take a brush and dip it into some disinfectant cleaner. Get into all those little spaces and corners to make sure you thoroughly clean the vent slats.

Step 2 – Making the Vents Dry 

Next, take a microfiber towel and use it to dry off the vents gently.

Also, remember to change your car’s air filter from time to time.

3. Flaking off of Evaporator Coating

There’s a component called an evaporator inside your car’s air conditioning system. It works to collect heat inside the car and recondition it. This component is coated with a thin layer of material (like metal or plastic) to protect it from wear and tear.

After some time, this coating can start to peel or flake off, causing debris to come out of the vents. This mainly occurs if the evaporator is exposed to extreme temperatures.

Fix: To clean your car’s AC evaporator without taking it off, Here are some items you’ll need: a towel or hairdryer, a screwdriver, a spray bottle, and evaporator coil cleaner. 

After you’ve gathered your supplies, follow these simple steps:

Step 1: Start by removing your car’s glove box.

Step 2: Inside the glove box space, you’ll find access to the AC evaporator coil.

Step 3: Use the spray bottle to spray the evaporator coil cleaner onto the coil.

Step 4: After spraying the cleaner, make sure to rinse it off gently so that water doesn’t spill elsewhere.

Step 5: To finish the process, you will need to dry the evaporator using either a towel or a hairdryer.

Step 6: Finally, put the glove box back in its place just as you took it off.

In this process, you won’t have to take off the Air conditioning unit to clean it. You can clean it simply from inside the car by following these steps.

4. Mold or Mildew Growth

When you neglect cleaning and maintaining your air vents, mold or mildew can grow inside the vent. This can be dangerous as it can spread multiple germs and bacteria through the air vents. It also leads to the buildup of flakes of debris. 

The vents’ dampness or humidity and poor airflow encourage mold or mildew growth, which is not suitable for you at all.

Fix: you can clean the air vents by following the process above. If it’s still blowing off debris, take professional help to clean it thoroughly.

You may be interested to read: 

What To Use To Clean Intake Air Temperature Sensor

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Final words

Debris coming out of air vent in the car is not a good sign for both the passengers and the driver. People with respiratory disease can suffer significantly if the air vents supply debris inside the car. Also, it’s frustrating for anyone to see debris inside the cabin and interior of their car.

To fix this issue, first, you need to diagnose the problem to see what’s causing it. By following the process mentioned above, you can check what is causing it and also fix it step by step. Leaving it as it is can create health issues and so on. So make sure to fix it as soon as possible.

Always remember to regularly clean and maintain the air conditioning system to prevent this type of issue in the future.

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