What Causes a Car's Electric Fan to Keep Running?

[VanJames]

Here is a detailed introduction to why a car's electric fan keeps running: 1. Function: The electric fan is designed to cool the radiator. 2. Air Conditioning On: The fan may run continuously when the air conditioning is on, as the radiator needs to dissipate heat, or when the engine coolant temperature is abnormally high. For automatic transmission vehicles, this could also be due to excessively high transmission fluid temperature. Here is additional information about the car's electric fan: 1. Working Principle: The fan absorbs heat through the coolant, reduces heat via the radiator, and uses water as a heat dissipation medium to maintain the engine's normal operating temperature. Upon receiving a signal indicating the engine's high coolant temperature, the water pump initiates continuous cooling circulation, and the fan keeps running to protect the engine. 2. Low Temperature, Stops Water Circulation: In winter, when temperatures are too low, the cooling water circulation may stop, and the engine may also shut down to prevent damage from low temperatures. 3. Abnormal Operation: If the car's operating temperature seems normal but the electric fan continues to run non-stop, it may be due to a faulty coolant temperature sensor, which fails to accurately detect the temperature, causing the fan to malfunction.