I have a 2004 tsx. The nav DVD player went out which took the ac down. I was able to finally find a decent priced player. All of the nav settings are working fine now. However, my ac is still blowing hot air. Could this be a freon issue or something I didn't reset when I put in the new nav player.

 

The Nav/DVD player is not in any way related to the A/C. Your A/C issue is directly tied to the A/C only.