Check your fuses... if not maybe the Fan blower Motor may have died.. GF's did a few months ago... its easy to replace and cheap.. like 30ish off ebay..
Doubt she could tell if the heat worked since its so hot here today.
She says no air with or without the A\C button depressed. I won't see the car
until later this evening. Thx
Like everyone else has said, check fuses, knobs (the back may have rounded out and she may not have noticed...who knows), the switch and the blower motor. Also check any wires or connections. IT could be something really simple.