Colored air coming out of vent

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  #1  
Old 08-30-08, 07:58 AM
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Colored air coming out of vent

...I'm guessing it's dust?

2003 Nissan Altima
101,000+ miles

Sometimes when I turn the ac on I see dust coming out of the vent and then it stops. What is that? Do I need to change my air filter or cabin filter or something or is that not even related? Or is it b/c maybe I'm driving in a very dusty city?
 
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  #2  
Old 08-30-08, 08:14 AM
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It's probably condensation. I'm not sure why it does it, I just know sometimes it does. Something to do with moisture on the coils right as it comes on I think.

One of the auto pro's could probably explain better.
 
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Old 08-30-08, 12:22 PM
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I agree with Gunguy45. Probably a blocked or partially blocked condensate drain line.
 
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Old 08-30-08, 04:15 PM
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so...that's a bad thing? Normal thing? Something I have to fix?
 
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Old 08-30-08, 04:35 PM
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Well, blocked drain will allow water to build up in yer A/C drain pan. Not a big deal to just blow or suction it out. Its where the water drips out on the driveway when yer parked. Not hard to do.

I've seen some cars that do it even when the drain is clear, just from the design. Newer cars shouldn't have that kind of an issue I would think.

Not sure if it can be a problem or not.
 
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Old 08-30-08, 04:39 PM
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Yes;Yes; and Yes.

It's bad because mold and mildew can grow.
It's fairly common, changing the air conditioner filter will help.
If your drain is not totally blocked, you should see some water dripping under the car after running the air. Follow the drips to the exit of the tube. Sometimes it can be cleaned from below, but they often have a one way valve which means tearing into the air conditioner from the top.
 
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Old 08-30-08, 04:56 PM
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*sigh*

Ok...I'll get it fixed but it's too hot for me out there to do it myself so I'll take it to the shop...soon. May have to wait 'til next Sat.

There is indeed stuff coming out from the bottom. I see it but I think I'll leave it up to the guys to clean this one for me.

Thanks guys
 
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