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.