Q: Air conditioning not working in the front of my SUV

Yesterday the front A/C just quit working on my SUV. It worked fine on the way to work, on the way to lunch, and then I stopped by the dealership to get wiper blades. Then, the front A/C just quit working when I got back in from the parts counter! I thought it was the controller, so I turned the truck off and cranked it again, but it was the same: no front air, but rear air. So, I went back to work and researched online and it said it could be blower motor. I checked the fuses and non blown up on the engine block. After a long hot drive home, my wife checked all the fuses. In the process, she broke a 40 amp circuit breaker, so off to the dealer again on Monday to get a new one.

So this is where it gets weird: I unhooked the ground cable from the battery so my wife would not get fried playing with fuses. After determining the fuses I could check were good, I hooked the battery cable up so I could go fill up the tank. Then, all of a sudden the A/C started working again. So this where I need your advice on a few things:

1. Do I need to go get it into the dealer for a code pull, inspection?

2. How do you pull those big circuit breakers (clear plastic female ones) out of the fuse box safely?

3. Friday, I had the SUV serviced: oil change, power steering and transmission fluid flush - a multi point inspection. Do you think that all it was is that the battery ground cable was not connected tight enough or something? Please give me some feedback! I am going on a road trip soon and I need to see if I need to bring it back to the dealer before I head out.