Anyone familiar with AC units?

I was in my crawls space and noticed that my AC unit is leaking what is probably 2–3 gallons/hour of water from the seams of the metal base, over some wiring, and then into the floor of my crawl space. I called a reputable repair service and they said it was “normal condensation”. I just replaced the entire system (expensive!) three years ago because it rusted out and ceased functioning. And arent’t crawlspaces supposed to stay dry? If it’s condensation, shouldn’t it be piped out? How far should I pursue this?