Why does the car fan turn on and off intermittently?
2 Answers
Car fan turns on and off intermittently because the water temperature is not high enough. Here are specific precautions regarding car fans: 1. Ensure normal operation of the cooling fan: The fan can only operate when it is in perfect working condition. Additionally, ensure that the power supply capacity is sufficient, the voltage is stable, and strictly avoid phase loss operation. The power supply line must be a dedicated line, and temporary lines should not be used for long-term power supply. 2. Maintain cleanliness: The environment where the cooling fan is used should always be kept clean. The surface of the fan should be kept clean, and there should be no debris at the air inlet and outlet. Regularly remove dust and other debris from the fan and the pipeline.
I've encountered this issue of the fan turning on and off several times. It could be a problem with the fan motor itself, such as aging coils or worn bearings causing it to operate unevenly. Alternatively, it might be a faulty temperature sensor sending unstable signals, causing the fan to turn on or off incorrectly, which can harm the engine. Fluctuating temperatures can lead to engine knocking or reduced lifespan. It's best to start with the simpler checks: see if any fuses are blown. As for the relay, where can you find it? Usually, it's in the fuse box in the engine compartment—check if it's loose or corroded. If the fan blades are stuck with debris, try gently nudging them by hand, but for safety, avoid tampering with electrical components. Fixing it early saves hassle; don't wait until the fan completely fails and takes down the entire cooling system, leading to costly major repairs.
