The RV Consumer Group is one place I recommend when you are considering purchasing a new or used RV. Their reports give useful information on specific brands. At one time, they had a court of public opinion where owners who had trouble with RVs could post about their situation. It not only let other potential buyers know, but put pressure on the RV manufacturers to correct the issue. It was shut down. George and I are pretty sure it was the constant lawsuits from the manufacturers that drove this decision. It's too bad; it was a useful resource.
I came across another consumer site that has postings about defective and problem RVs. It's called PissedConsumer.com. My alerts showed postings - complaints and reviews - about Coachmen and Keystone. There may be other manufacturers reviewed.
I would add this to your list of places to check when in the market for an RV. And, I'd take the postings with a grain of salt. It certainly gives you a direction to research, to see if this is indeed a regular problem and also gives you a clue about a company's customer service and followup care.
Let's hope this consumer site is not shut down. Jaimie Hall Bruzenak