What Causes a Car Fan to Keep Running?

[DeEmmett]

There are several reasons why a car fan keeps running, including high engine temperature and poor electrical connections. Below are detailed explanations: High Engine Temperature: The engine may still be in a high-temperature state if the coolant temperature hasn't dropped yet. The wiring for the coolant temperature sensor is not controlled by the ignition system. As long as the temperature remains high, it will send a high-temperature signal to the computer, causing the fan to continue running to cool the engine until the temperature drops to an appropriate level. Poor Electrical Connections: If the fan keeps running even after the engine temperature has dropped, it may be due to poor electrical connections. You can try unplugging the fan's wiring harness to perform a separate power-off procedure.