I am installing my new PX6 radio in my F150 and everything works but the a/c. I have heated/cooled seats, so I leave the a/c controller in my truck. The install instructions say to use Mustang as the vehicle. I have set everything per instructions and it still doesn't work. I tried F150 hi and low as vehicles and still nothing. Has anyone run into this problem and what did you do to fix it. I really like this radio and hope to get it working. Also does anyone know why Phoenix isn't answering their phones, I have been trying to contact them for a week now. Thanks in advance for any help.