I have a 2006 Tribute and have been having problems with the a/c for a while. At first it would blow a fuse when i would use the defroster and completely stop working until i replaced it. Now it blows but only gets cold on the defrost and and under/ feet setting. After it i use it for a while on those settings i can switch to regular or over head with feet and it will blow cold air for a few minutes then it stops cooling again until i switch it back. Has anyone had this issue or know what might be causing it?