When driving with the A/C on, it will randomly stop blowing air. You can hear the compressor , and I think the fan working, but the vents have no air flow. Switching between A/C, vent, and heat will not create air flow. If you shut off the air for several minutes it will start blowing again.
Possibly related, occasionally the instrument panel lights will go out. I assume that is not related but is a fuse loose or something.