Defroster not working +

I just checked the vacuum lines and they all seem to be ok.
I also just found out that whether I press the "defrost" or the "floor" buttons, the air only comes out of the dash panel vents ????

Could it be the control head maybe??

I replaced my blend door a couple of weeks ago and maybe something to do with that???
H-e-e-e-e-e-l-p