2005 kia sedona AC not cooling

There is a BCM computer ( body control module) that runs all this.
http://www.kia-forums.com/kia-carnival-sedona-2002-2005/255434-2005-sedona-bcm-location.html
Check the wires to it.

Check fan motor ballast resistor.

check that the heater control (tap ) is being turned on by the controls.. Have an accredited ac mechanic check the ac system .

This model has a rear heat/cold blend door actuator. Its an electric motor that moves the duct door from hot to cold. When they wear out, they're usually stuck on the last setting

If yu didn't already try, make sure your setting is not on defrost or defrost floor. This car automatically puts the setting on ac and recirculation. Turn it he setting off defrost and try again

Around 1500 for the first few seconds depending on engine and air temp.

check to make sure the main wire going to the starter is tight mine was corided and did the same thing ..just a thought

If you dual climate control sounds like it the mode door actuator that controls driver and passenger temp. If it went bad again then there is something wrong with the mode door itself causing the actuator to short out

you will have to get a dye injected into the system or have it checked witha freon probe

You need to repair the heater core with a soldering gun.

If you do not have heat, or only have heat, IMHO it is most likey the AC/heater control unit. This is the part which has the AC/heat control buttons and knobs.

Easy Diagnosis:
The easiest way to verify this is to turn on the radio, press and hold the power on/off button and press and hold the scan-up button for a second (full second). The word "A/C TEMP" should appear on the left of the display and a number from 0 to 16 on the right. I suspect yours will have the number 0 (or 16 if heating only problem) displayed no matter where you turn the temperature control knob. If this is the case you could turn the temp. knob to full heat and see if it goes to 16 after pushing down or to the right on the knob.
In a working system, the number moves evenly in increments of 1, from 0 to 16 as you turn the temperature knob.

Easy Fix:
I was able to take mine out and solder 3 loose connections to fix it.

The beginning steps are the same as for any radio removal procedure and check for loose connections.