AC filters need to be changed every 15,000 miles or once a year.

I had a interesting find. This AC cabin filter was way over due. WAY over due!!! It should of been changed years ago. Almost no air came out of the air vents. Do not let your filter get like this. Have your AC filter inspected at least once a year. In Arizona we have fine silty dirty air and the AC is running all the time. More frequent replacement may be necessary.

AC cabin filter

Dirty AC cabin filter