What Causes the Car Fan Not to Rotate?
2 Answers
Here are the specific reasons why a car fan may not rotate: The water temperature has not reached the required level: The car radiator fan operates with electronic temperature control, and generally, the fan only starts rotating normally when the internal water temperature reaches the required level. If the temperature is too low, the radiator fan will not rotate. Long-term wear: Prolonged use of the fan can cause severe wear, as the motor may degrade. Once the motor's bushing wears out, it can easily burn out. Motor overheating: The fan assembly includes a motor, which has an overheating circuit breaker. If a short circuit occurs in the coil winding, it can cause a rapid increase in heat generation, leading to the motor not rotating.
There are several reasons why a car fan may not be working. From my experience in maintaining older vehicles, the most common issue is a problem with the fan motor, which may fail to operate due to aging or burning out. Another possibility is that the blades are stuck, perhaps clogged with too much dust or debris preventing rotation. Additionally, if the fan belt is too loose or broken, it can also stop the fan from moving. In winter, sometimes it's related to the air conditioning system, where the fan not starting at low temperatures is normal. In any case, safety comes first—if the fan isn't working, the engine can easily overheat, so it's important to stop and check immediately. Continuing to drive long distances at high temperatures can easily lead to cylinder scoring or engine damage. A simple test is to turn on the air conditioning to see if the fan starts working; if not, it's best to seek professional help promptly.
