You're lying in bed on one of the hottest nights of the year. Fortunately, you've got a nice, quiet fan on top of your dresser to keep you cool while you sleep. Suddenly, that fan starts making a noise akin to an angry Rottweiler. You try turning it off and on. You try shaking it. You even try pleading with it, but nothing you do will quiet that fan. It can't be denied. That fan is on the fritz.