tuby

SORRY IF THIS IS THE WRONG POST....hey guys, i need some help....my level 1 and 2 of my fan/blower doesn't work. but 3 and 4 does. this is the fan/blower or what ever you call it for the heater and a/c. when i put it on the 1 or 2, and i push the a/c button, the a/c light comes on but no air blowing or coming out. same thing for heater. so i was wondering, is it an electrical problem with the switches, which i doubt since it recognizes the a/c, or is it the fan/blower? please help me on this and any help is well appreciated. thanks