Why does the car fan rotate intermittently?

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Here are the reasons why the electric fan does not rotate: 1. Poor motor lubrication: The fan does not rotate because the motor lubrication is insufficient, preventing the motor from driving the fan blades after installation; 2. Motor overheating: Overheating can also reduce the motor's load-bearing capacity and effective power, making it unable to drive the load; 3. Reduced starting capacitor capacity: The capacitor's capacity may decrease, reducing the motor's starting torque and making it unable to drive the load; 4. Prolonged motor use: If the fan has been used for a long time, the motor may wear out. After the motor's shaft sleeve wears, it can easily burn out. Long-term use can also increase the motor's internal resistance, reducing its load-bearing capacity and preventing it from driving the fan blades.