My AC won't blow sometimes after I start my Max. Has anyone had a similar problem to this?

I was going to take the car for a diagnostic to find out what is wrong but I thought I would ask to see if anyone has had this problem before.

Basicly I turn the car on and the AC seems to be working but no air is comming out of the vents. I hear the compressor come on along with the radiator fans but nothing comes out of the vents. The problem is not consistant, it works fine about 90% of the time then if I stop somewhere turn off the car and then turn it back on it wont blow. I get home turn the car off, turn it back on and it starts blowing.

Anyone got any ideas?
97 SE with Auto Climate Control

 

Does it work on fan speed 4 when it doesn't work? If so, it's in the faq.

 

No it doesn't work on any fan speed at all when it doesn't work. Nor will it work if I play with the modes, heater, vent, fan speed, or temp. If I turn the car off and then back again it will sometimes come back on or if I drive about 2 minutes with it on sometimes it will suddenly come on.

It's a very strange problem.