[ECO] Unused Generator catches fire randomly

I thought i was going insane. I had this happen to me the other night. So in my current game I have a little "utility" building out in the yard, where i have power and water generators. One night two of them caught on fire, put fire out and deleted the burnt ones. Didn't replace them as my sim didn't have enough money to. Then literally a few minutes later a fire started where the generators were, but there was nothing there. Like the OP states, the fires just started on nothing! kept putting them out but it kept starting back up. I saved the game, and quit. Repaired my game and played it the next day. I haven't had it happen since. So it makes me think that its some sort of bug that is only triggered once there is a fire, and stops after you quit the game/or repair? Just my thought from my experience.