Why is the radiator fan of a sedan not working?

[GabrielaLee]

The reasons why the radiator fan of a sedan is not working are: 1. The fuse is blown; 2. The thermal switch is damaged; 3. The air filter is clogged; 4. The coolant is missing or the heater core is blocked. The usage and maintenance of the radiator are: 1. The radiator should not come into contact with any acid, alkali, or other corrosive substances; 2. It is recommended to use soft water, and hard water should be softened before use; 3. Use antifreeze to prevent corrosion of the radiator; 4. During the installation of the radiator, do not damage the cooling fins or dent the radiator; 5. When completely draining and refilling the radiator, first open the drain switch of the engine block; 6. In daily use, always check the water level and add water only after the engine has cooled down.

[VanJeffrey]

I often encounter situations where the radiator fan of a sedan doesn't rotate, and there are quite a few possible causes. The most common one is a blown fuse. There's a dedicated fuse in the fan circuit that tends to melt when the current is too high, causing the fan to stop working entirely. Next is the issue with the fan motor—if the motor is damaged or making unusual noises, the fan naturally won't turn. The temperature sensor could also be faulty. The fan relies on it to detect when the coolant temperature is high before starting. If the sensor doesn't respond, the fan won't turn on in time. Then there's the relay—this small component controls the switching signal. Poor contact or burnout in the relay can prevent the signal from being transmitted. On the electrical side, issues like short circuits, open circuits in the wiring harness, or loose connections are also common. I recommend first checking and replacing the fuse yourself by opening the fuse box. If that doesn't work, take the car to a professional repair shop as soon as possible. They can accurately diagnose the problem with specialized tools. Don't delay—a non-functioning fan can lead to engine overheating, causing serious damage and posing safety risks.

[DeGideon]

Last time I was driving my sedan, the fan suddenly stopped working, which was quite concerning. The reason could be a blown fuse, as the fan circuit is designed to be sensitive and can easily trip if the current is too high. Alternatively, the fan motor itself may have aged and seized up; sometimes you can hear the fan not making any noise or producing strange sounds, which indicates a faulty motor. A malfunctioning temperature sensor is also common—if the coolant temperature isn't high enough, the fan won't start, but if the sensor is broken, the fan remains permanently inactive. Relay issues can also occur; if the relay contacts are burnt out, the fan won't receive a control signal. Electrical problems like loose connections or aged, cracked wiring can also interrupt power supply. My first step is usually to check the fuse and try replacing it. If that doesn’t work, I head straight to the repair shop—they have the expertise to prevent the car from breaking down on the road and causing delays.

[LilahAnn]

The fan not spinning, with a blown fuse being the primary suspect, relies on the fuse to protect the circuit; if it's disconnected, the fan stops working. A faulty temperature sensor is also common, causing the control logic to malfunction and the fan to fail to spin when it should. Motor failure can completely immobilize the fan, and unusual noises may indicate motor issues. Relay problems can interrupt the control signal, leaving the fan without instructions. Short circuits or open circuits in the wiring can also cut off power. When handling it myself, I first check the fuse box and replace the fuse. If that doesn’t work, I avoid driving long distances and go straight to a professional shop for a safe inspection.

[LeRobert]

I was quite nervous when I encountered the radiator fan not working while driving, as it can easily lead to engine overheating and damage. Common causes include blown fuses, as the fan circuit fuses are fragile and prone to burning out. A failed temperature sensor means the water temperature detection malfunctions, preventing the fan from triggering. A burnt-out fan motor directly causes the fan to stop. Relay failures interrupt signal transmission, leaving the fan without a start command. Circuit issues like wiring harness shorts or corroded connectors are also common. The key is to stop the vehicle immediately to prevent overheating. Try replacing the fuse yourself if possible; otherwise, seek a technician right away. Regularly cleaning the cooling system can help reduce such failures.