No air is coming out

Hey, when i turn the air on (cold or hot, even when I press the AC button). No air comes out of the vents. I hear the motor come on but nothing comes out the vents. I press the different vents buttons, but nothing works. I don’t know if the rear defroster works because I haven’t got the chance to check it out. Thanks in advance!

i would start at the blower motor you say you here it turn on have you physically checked to see if the blower fan is spinning.