Why does the Volkswagen CC radiator fan keep running?
2 Answers
The reasons why the Volkswagen CC radiator fan keeps running are as follows: Engine temperature has not dropped: If the fan continues to run after the engine is turned off, it indicates that the engine temperature has not yet dropped and remains at a relatively high level. The coolant temperature sensor circuit is not controlled by the ignition system. As long as the temperature remains high, the sensor will send a high-temperature signal to the ECU, causing the fan to keep running to cool the engine until the temperature drops to an appropriate level. Insufficient antifreeze: Check if the antifreeze level is low, which could lead to high engine temperature. Also, inspect the circulation of the coolant to see if there are any blockages. Additionally, components such as the coolant temperature sensor, water pump, thermostat, and cooling fan should be checked, as any of these could cause high engine temperature.
I often encounter this issue when repairing cars. The main reason why the Volkswagen CC's radiator fan keeps running is that your engine is overheating. The temperature sensor might be damaged or malfunctioning, causing it to continuously send a start signal to the fan because it thinks the temperature is too high. A stuck relay can also cause the same effect, and a short circuit or aging in the fan circuit can lead to this as well. When the air conditioning system is running, it adds load, so the fan naturally runs more. You should first check if the coolant level is sufficient—where is the scale on the reservoir? If it's low, top it up immediately; otherwise, the fan won't stop, wasting fuel. Additionally, problems with the thermostat switch are quite common, especially in Volkswagens. If ignored for a long time, fuel consumption will increase, and the fan motor might even burn out. I recommend taking the car to a reliable repair shop to diagnose the specific fault code—don't tinker with it yourself to avoid causing bigger issues.
