The past couple of days I was hearing a "roaring" noise which i though was coming from my Igloo tabletop icemaker which I keep on the floor between the bedroom/bathroom steps and the circuit breaker panel. Today the roaring noise didn't go away by itself, and I was startled to find that it didn't go away when I unplugged the icemaker from the outlet. Then it dawned on me that the noise was the central vacuum cleaner ( which I have only used a couple of times in the 11 years I have owned the Bighorn - I have a conventional vacuum cleaner). I am wondering if this switching on by itself could be related to the burnt wiring and evident fire damage reported by others. I can envision a scenario where the vacuum runs for hours by itself when the RVers are away from the trailer, maybe even finally shutting off before they get back. I simply turned off the circuit breaker on mine for now. This might be a good idea for others who are concerned about the recent fire damage postings. You can turn the breaker ON if/when you choose to use the central vacuum system.