RV manufacturing is high volume, resulting lower quality. Dealerships pick up the slack under warranty repair. Many repairs never get addressed, resulting cost savings to the manufacturer. Keep in mind higher quality also results higher prices for the units (look at Intech, great units, cost too much though).
SO, take your unit to an authorized dealer and give them the list to file as warranty work, they will take care of it. I do these kind of repairs fairly frequently.
I will say Gulf Stream is one of the better ones, I personally own a Gulf Stream, and am an RV Service Tech.