Sorry, been away for a while and wanted to update.
Dealer finally found the problem, after replacing the circuit board... and having it blow again. When I dropped it off, I mentioned that the remote control for the slides and awning was not working. When they checked the new remote, they found that the remote was actually trying to start up the hot water heater! Wires were crossed somewhere during manufacture, and the dealer spent 13 hours checking them all with a meter until they found the issue, and ran new wires. We got it back, and it's working great ~ but now our slide is blowing fuses every time you open/close it (the fuse box inside the entertainment center/bedroom wall, not the breakers) and water pump is vibrating so much it sounds like it's going to come through the walls. Gotta love Crossroads quality control...