1. Increased noise: Improper installation of the cooling fan may cause friction or vibration between the fan and other components, resulting in noise.

2. The temperature is too high: Improper installation may cause the Ventilation fan to fail to effectively reduce the temperature, which will cause the electronic device to overheat.

3. Circuit failure: Incorrect installation may result in damage to fan components, such as falling wires or fan blades colliding with other objects.