Smoke, Mist or Fog will come out of your A/C vents on hot, humid days. The reason for this normal phenomenom is the cold, dry air coming from your A/C vents is lower than the dewpoint of the interior cabin. Basically what this means is that cold, dry air is mixing with hot, humid air and causing the smoke. This is similar to when you open your freezer door and see the fog coming from the freezer. This is a normal condition and will eventually dissipate once the temperatures in the interior cabin and the A/C vents start to balance out. One way to quickly balance the temperature out is to keep the A/C system on recirculated intake air. Hope this answers your question.
Moisture in the air condensing into mist.
It doesn't have to be if you close the vents and turn it down to a warmer temperature.
If dust is coming from your air conditioner, you did not put in a filter. You will ruin your air conditioner running it without a filter. Also, the vents will get dusty. You need to clean them.
If central air conditioner turns on but is not blowing through the vents, check the filter. If it is dirty, change it. Change the thermostat into cool, this will defrost the air conditioner.
The air of your Chevy trailblazer 2004 blow out of the front vents when the air conditioner is on because the air condition is faulty and it needs repair.
An air conditioner evaporator is the part of the a/c system that the heat in your car transfers to causing cool air to blow from your vents. The blower is in front of it and it sucks air from the inside of your car and across the evaporator then blows out your vents.
The flasher button on a 2001 altima is above the middle air conditioner vents by the dash. It is a sort of square button that you push in to make them come on and push in again to turn them off.
There are usually vents under the tail lights.
It's probably mold. You can buy chemicals that are added through the intake that might fix it.
There is most likely a vacuum leak on the line from the engine to the air conditioner control.
I'm investigating this as well. I have a 2008 and have been told the air conditioner is only off when you have the vents on the floor only. Still checking this out.