where is the filter for the air conditioner and how do I change it the air does

you probably have a blend door problem or the door actuator

When you turn on the system, does air come out anywhere at all? Do you hear the fan running? Do all of the functions on the HVAC controller work? The fresh air intake filter is located behind the glove box. Here are the instructions for replacing it, but it is not your problem. You should however check it whenever you check your engine air filter. It has about the same service life. Passenger Compartment Air Filter Replacement Removal Procedure 1. Open the instrument panel (I/P) compartment. The access door for the passenger compartment air filter is located behind the glove box.  2. Tilt the I/P compartment door down by squeezing in on each side of the bin until the door stops can be removed from the tracks.  3. Lower the I/P compartment completely.  4. Open the passenger compartment filter door by reaching through the opening in the rear of the I/P compartment and raising the tab until the door can be opened downward.  5. Remove the filter by sliding the filter out of the passenger compartment filter housing. Installation Procedure Important: Make certain that the air flow indicator is pointing down.  1. Install the new filter by sliding the filter into the passenger compartment filter housing.  2. Close the passenger compartment filter door and snap the tab down to latch the door.  3. Raise the I/P compartment door until the door stops contact the frame. Slowly raise the door until the doorstops snap into their tracks.