Sounds like the airflow direction control knob has come unhooked from its linkage. Your best bet is probably to open up the dash and to have a look at the proper linkage, at the back of the HVAC module (the one with the three knobs). It'll be one of the three cables - either green, yellow, or clear - can't remember.My blower works fine on my 07 Versa. But I can not choose where the blower blows out of. It only blows out if the vents. I would love to switch it to my feet or defrost.