2001 Honda Civic no air blowing in cabin?

My air was blowing just fine yesterday but when I got in and started my car today I was not getting any air at all in the cabin meaning nothing was blowing. Could it possibly be a blower motor resistor? I did not check all fan speeds but will do so if needed

Check the fuse - it will be most likely the problem.

Check fuse # 1 (20A), # 4 (20A), #12 (40A) and the blower motor relay in the under hood fuse/relay box first. Then fuse # 14 (7.5A) in the under dash fuse/relay box. Does the light(Illumination/ Indicator) in the AC/Heater switch lit when you turn the system on?
Yes, it could be the blower motor transistor, the AC/ Heater control panel switch or the PCM itself (Rarely) depends on the failure. Also it could be the air cabim filter clogging up if all blower speeds are there but blowing really weak.
I have included the first wiring diagram for you to check. YA allow one picture/ diagram send so send me your E mail address if you want the rest of all three diagrams for the system. Including the diagnostic procedure for the blower system.2001 Honda Civic no air blowing in cabin