Compressor not operating.
There are a couple things you can try...1. Check the furnace filter. If it's dirty, replace it.2. Make sure your return air registers are not blocked.
The air is probably too cold causing condensation at the vents. try increasing the air flow which will warm it a few degrees.
Most certainly
It could be a bad heater core, or a faulty air intake, but i don't know all that much about vehicles, but I've experienced this and it was a faulty air intake.
2003 crown vic air conditioning vent dont blow
The blend door actuator may not be working.
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.
The HTR RR switch in a Kia Sedona determines which air vents the air is blown through from the rear heating. When it is pushed in, the lower vents blow hot air, and when it is not pushed, the roof vents blow cold air.
If the air vents of the Chevy trailblazer 2004 are not blowing air, have the fuel pump checked.
Possible blockage in the rear air units expansion valve. I just replaced mine for the same reason.
air want blow out vents
Your front blower motor has gone out. There is a front and a rear blower motor.
why dont bottom vent doors not open on 2001 gmcsonoma
Moisture in the air condensing into mist.
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Try pulling the heater ducting apart near the fan box, found under the dash passenger side. It is probably full of leaves etc. Remove all debris and reassemble.if you are trying to get the dash vents to blow hot air they were not designed to work that way they only blow hot air threw defroster,foot and in front of shifter and outter dash vents i replaced the entire blower motor assembly than called suzuki to ask why the center dash vents dont blow hot air he informed me that this is a common complaint but they were never designed to blow hot air