This is yet another strange issue that I never experienced on my car until about a year or so ago. For some odd reason, the engine's fan will stay on when the car has been shut off. Now I could understand it needs to cool.....but if the car is off, it'll cool down anyway! It does this completely randomly. It doesn't matter how far or how long I drive, or how long the car's been running. It just does it sporadically..