Why is one radiator fan of the Sagitar spinning while the other is not?
2 Answers
The reasons why one radiator fan of the Sagitar spins while the other does not are as follows: 1. Whether the water temperature meets the requirements: Nowadays, most car radiator fans operate electronically based on temperature control. Therefore, the fan will only start spinning normally when the internal water temperature of the car reaches the required level. If the temperature is too low, the radiator fan will not spin. Hence, if the car radiator fan fails to spin, the first thing to check is whether the water temperature meets the requirements. 2. Relay failure: If the water temperature meets the requirements but the car radiator fan still does not work, the issue might be with the fan's relay. If the relay fails, the car's radiator fan will also be unable to operate.
A while ago, my own Sagitar also encountered this issue. It turned out there were two main possibilities: either poor contact due to separate control of the two fan circuits, or a single fan itself was faulty. The Sagitar's dual-fan design features one main fan for engine cooling and a smaller auxiliary fan that also handles the AC condenser, which is especially noticeable in summer. If the AC is on but the small fan isn't spinning, you'll feel insufficient cooling from the vents. A simple way to check is to see if the spinning fan only works at full capacity when the water temperature is high, while the other remains silent. If you can't hear the second fan starting up, it's likely faulty. Don't try to fix this yourself randomly—many auto repair shops have OBD scanners to read electronic fan error codes, which is much easier than removing the bumper to check the wiring. If the fan assembly is faulty, replacing it with an original part costs around 1,000 RMB, with labor fees depending on the specific model and installation difficulty. Regularly cleaning debris in front of the radiator can extend the fan's lifespan.
