I've noticed recently that my radiator fan isn't staying on after I turn the car off. I tested it by turning the A/C up to max while sitting, and it does run then, and I haven't had any issues with overheating. I've done some searching, and haven't found anything specifically on this issue - any thoughts?

 

N18? If so, the DME considers three parameters to run the fan after turning off the engine: (1) coolant temp, (2) high-side refrigerant pressure, (3) turbocharger-related calculations based on length of drive, engine load/boost usage, and exhaust gas temps.