Why is the cooling fan still running after the car is parked?

[AaronRose]

It is cooling down the engine. This is a normal phenomenon, not a malfunction, and no action is required. Below is relevant information about automotive cooling fans: 1. Axial fan: The blades of an axial fan push air to flow in the same direction as the axis. The impeller of an axial fan is somewhat similar to a propeller. During operation, the majority of the airflow direction is parallel to the axis, in other words, along the axial direction. The power consumption of an axial fan is at its lowest when the inlet airflow is free air at 0 static pressure, and it increases as the back pressure of the airflow rises during operation. 2. Centrifugal fan: When a centrifugal fan operates, the blades push air to flow in a direction perpendicular to the axis (i.e., radial direction). The intake is along the axial direction, while the exhaust is perpendicular to the axial direction. In most cases, an axial fan can achieve the cooling effect. However, sometimes if the airflow needs to be rotated 90 degrees for exhaust or a higher air pressure is required, a centrifugal fan must be selected. Strictly speaking, a blower also falls under the category of centrifugal fans.