Yamaha Viking fans are a problem, last year when mine was new the fan stopped working, I checked fuse, breaker, relay and put 12 volt straight to the fan no go. Because it was under warranty I hauled it down to the dealer for repair. Their tech checked everything out and the fan worked perfect. Haul her home and have used it with not problem until last Sat morning went out to meet a group and the fan noworkie again. Checked everything out again "it's the fan" back down to the dealer (warranty) yep fan bad, on order should be done next Wed. Now you would think that the dealer would have a couple of these fans in stock, no that makes common sense. I told the service writer I wanted the old fan back so I can take it apart and see just what the problem is. Some have said it is caused by water and I've also heard about bushes sticking or some such thing. If they give me the fan back I will post what I've found when she gets inspected. I suspect cheap crap fan motor.