Fan blower
4 Answers
Are you asking about your cabin heater/AC fan or the cooling fan on the engine?
Your car probably has an electric cooling fan that shuts down when the engine temp drops to a pre-determined level. It does not necessarily stop when the engine stops running. Probably a coincidence that it turned off for you when you shut the hood. No need to do anything - it is not a problem unless it continues to run when the engine is cold (this will drain your battery). They usually shut down in under 5 minutes.