Why does my Acadia if ac blow hot air

Hello, sounds like a climate control system issue. If your entire climate control panel is "off" and there is still air blowing - something is malfunctioning electronically. There could also be a problem with the refrigeration system with the AC -- but it's impossible to know with the other issue definitely occurring. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops