What causes car fan to smoke?

1 Answers
McJanelle
07/29/25 3:52pm
Possible causes include fan circuit malfunction or coolant leakage. It is recommended to visit a 4S shop for repair. Additional information is as follows: 1. Fan operation principle: Automatically activates or stops based on coolant temperature. At high speeds, the air pressure difference between the front and rear of the vehicle is sufficient to maintain proper coolant temperature without fan operation. Causes of car fan failure include: 1. Faulty coolant temperature relay: Replace if there's poor contact or no response. 2. Damaged thermostat switch: Prevents fan activation when coolant temperature is high. 3. Fan damage: May be caused by overload or short circuit burning - requires immediate replacement. 4. Wiring issues: Short circuits or broken circuits will generally cause fan failure.
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