To answer your questions, yes, my dad had me look at the breaker as well as the unit outside. But, he told me to look for a handle... my neighbor explained to me last night that these units have a small little button (more like a piece of metal covered in rubber) near the bottom- if she hadn't told me what to specifically look for, I never would have seen it or known it actually did anything. Apparently it just needed to be reset or something- but now it works! (Thanks, Kim!)
It's only 75 in here today, though, so after it started working I set it on 80- we should be good now!