What Causes the Car Fan to Stop Rotating and the Water Temperature to Rise?
3 Answers
Car fan not rotating and high water temperature are caused by a short circuit in the motor. The following are the specific reasons for high car water temperature: 1. Insufficient coolant: Coolant leakage or insufficient coolant can cause the engine water temperature to rise. In this case, the coolant level should be checked and topped up to the appropriate level if necessary. Check again after a few days to see if the level has dropped significantly. If it has, locate the source of the leak. 2. Faulty cooling fan: When the vehicle is running at high speeds, the heat generated cannot be transferred to the coolant in time, affecting heat dissipation and causing the coolant temperature to rise. This can also lead to issues like boiling over.
I've been driving for decades and have encountered this issue of the fan not spinning and the water temperature skyrocketing several times. It's usually related to the electrical system. The fan is a critical component for engine cooling, and if it doesn't operate, the water temperature naturally goes out of control. It could be due to the fan motor aging and seizing up or the connecting fuse blowing, especially in older cars where this is more likely to happen. The inspection method is quite simple: first, pop the hood and touch the fan cover to see if there's any vibration. If there's no movement, open the fuse box, locate the fuse corresponding to the fan, and check if it's burnt out. If it still doesn't spin after replacing the fuse, the motor might be broken and needs replacement. For prevention, pay attention to the fan's operation during regular maintenance—don't wait for a failure to address it, as it's both costly and dangerous. In short, timely inspection and repair can prevent being stranded on the road.
As someone who often repairs cars myself, a fan not spinning leading to high coolant temperature is mostly an electrical issue. When checking, start with the fuse—see if the fan's fuse in the box is blown and try replacing it; if there's no power to the fan, it might be a faulty relay or temperature control sensor. During my DIY repairs, I use a multimeter to test voltage—if the power supply is normal but the fan doesn't spin, the motor is likely damaged and needs replacement. By the way, aging wiring can also cause short circuits, especially prone in summer heat. The repair isn't complicated, but don't delay, or engine overheating can cause serious damage.
