something whirring

[crolandc]

Hi, just wondered if any one knows what the fan like noise is in my dash when I am sitting in it after I have switched the ignition off ? was sat there for 30 mins today and expected it to stop after a few mins but it kept on going, lifted the bonnet & everything was quiet under there. My car is a 2014 3.0d X3, thanks for any answers or guesses.

[SantaBarbara]

What was the ambient temperature

[cuprabob]

On some cars the cooling fan in the headunit runs on for a period after it's been switched off.