I have a 96 millenia and the heater is blowing cold air and my manual doens have a troubleshooting for this problem anyone had this problem before thnx for the help

 

start with the controls. on the back of the panel, inside of your dash, there are wire drive cables that can get loose and not let the **** turn out of it's postition. i am having this problem on my p5 right now, but i am just too busy/lazy to fix it.