Hi mslater,
The kitchen sink will fall if some of the support clips are missing. From the few posts I've seen over the years, the factory seems to miss this once in a while. Fortunately, JohnDar has posted some helpful info and pictures on how to fix it. Here's a link.
The Norcold fridges have had a couple of posts about a module on the back of the frig getting wet while washing the trailer, and one or two with failed cooling units. You might call Norcold to see what advice they can offer, but they'll probably tell you to get to an authorized dealer.
Fantastic Fans are pretty reliable. I don't suppose you're in a cold weather location where the cover might have frozen shut. Also, there are some controls on the fan that can override the thermostat. If that's not it, I think they have a 2 year warranty from the manufacturer, so you might give them a call. I think this might be their number: 800-521-0298.