you may just be low on freon
You may need to have your AC charged
The coil is dirty.Hose it out with a water hose.
There are 2 filters you access in the glove box. If they are dirty you get almost no air. Clean or replace them and be amazed at the difference
If the air vents of the Chevy trailblazer 2004 are not blowing air, have the fuel pump checked.
The most common cause of an air conditioner not blowing air is a plugged filter. Be sure your filter is clean.
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.
Without testing a guess would be a blend door or actuator or maybe a control problem
The inside of the ductwork is dirty and is blowing the dirt out.
Car not blowing air or heat
what could be wrong is you might have a vacuum leak somewhere or something is disconected in the dash that switches to the vents. I had a problem with my 97 blowing air threw the floor and it was a little vacuum leak that caused it
It is more then likely your heater core. is it fogging up in your vehicle?
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