2001 Lincoln Town Car Ac fan won't come on

I got int the car today, and took a drive about 15 minutes or so and when i turned the car off for about 15 minutes i got back in and realizerd that now when i turn my ac OR heat on, it doesn't blow AT ALL, it sounds like its trying but no matter what i do or what setting i put it on the fan won't blow any air at all, and the digital screen that tells you the fan speed will show the setting (fast or slow) but doesn't say "fan" next to it like it normally does when its working properly. Please help me out, I thank you for your time!!