Hello all I'm having a A/C issue my front air is blowing hot and rear air is cold I was told it was a blend door problem so I replaced it. I did in fact test the door before putting it all back and it worked fine. But I did notice it's still coming out hot and also noticed that the evap coil isn't even getting cold. What would cause this problem. The front a/c lines are cold but no cold air comes out of vents still.