vent wont change

[ranziel]

hey guys i have this problem with my 97 240sx
the vents would not change from vent to def..
the first thing i replaced was the bi level motor because it was bad.
then replaced the control unit and still would not change front vent to def
got a used control unit and still the same so i replaced the mode door motor and still nothing
i would a appreciate any help

[victorw210]

I think there's 2 ac fuses under dash check both one.I had one blown and thought it was mode door motor