Rear radiator fan??

I took my Stingray on its first long drive this weekend -- Jax to Naples -- I got countless thumbs-up from passing cars and bikes -- yes I was going that slow. Anyway, when I arrived down south after five hours of driving I heard what sounds like an electric fan running back behind the cockpit? Same thing when I got home last evening… I had not heard of them having aux fans in the rear area so I'm wondering if anyone can help clear this up for me?