Shouldn't be a big deal to replace the fan motor yourself. I'd call the dealer and send them the bad one and have them send you the replacement if it's under warranty. If not, pickup a replacement on the internet.
I assume you've made sure you have 12v to the fan by checking fuse, using meter at fan, etc.
Days camping (2015)----88 days
Days camping (2016) ---110 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi
30 years RV'ing
12 different RV's