There are a few signs that can indicate a bad radiator fan motor:
1.Overheating: If your car's engine is constantly overheating, even in normal driving conditions, it could be a sign that your radiator fan motor is not functioning properly. The fan motor helps to regulate the temperature of the engine by pulling air through the radiator to dissipate heat.
2.Noise: If you hear strange noises coming from the fan motor, such as grinding or clicking sounds, it could be a sign that the motor is failing or has already failed.
3.Fan blades not spinning: If you open the hood of your car and observe that the fan blades are not spinning when the engine is running, it could be a sign that the fan motor is not working.
4.Fan running all the time: If the fan is running constantly, even when the engine is cold, it could be a sign that the fan motor is not functioning properly. This can also lead to a drained battery.
If you suspect that your radiator fan motor is bad, it's important to have it inspected by a qualified mechanic as soon as possible to avoid engine damage and costly repairs.