I bought a new Starcraft in February. I've found a couple of areas where the manufacturing was done poorly and caused wires to fray / strip and start blowing fuses. The first was the wiring to the water pump that some wizard decided to place directly under the metal frame of the furnace. After about a thousand miles on the road the fuse frayed, and every time I turned on the water pump - pop!
The second place was on the electric awning where some wires were sticking out of the track they should have been and rubbed raw and exposed - so the awning was stuck deployed. Luckily, I found the problem and fixed it with about 6 inches of electrical tape and put the wires back into place.
You might be experiencing something like this as you have a new trailer.