My vents and air controle does not work can someone tell me how to adjust my vents
 

So my air turns on but nothing adjusts or does anything for that matter. My backseat vent blows cold air from the ac but thats it when i put my hand agenst the front vents it almost feels like there sucking some have told me blend door actuator and some have said controle module.. bottom line is if i cant fix it now is there a easy way to adjust my vents manually so i can atleast defog my windows any help with this would be much appreciated