Motor is locked up unless it is belt driven. In that case the belt can be broken.
Motor is locked up unless it is belt driven. In that case the belt can be broken.
If it only hums, the motor isn't able to rotate. First disconnect the driveshaft and try to run the motor. If it runs, the pump is bound up/clogged. If the motor continues to hum, the bearing is shot. Repair or replace motor. Good luck.
The radiator fan sensor switch or the radiator fan motor are at fault (maybe even both). Wire the fan motor direct to see if it will run, if it does, replace the sensor switch. If the fan motor doesn't run, replace the fan motor before you buy a new sensor. If after replacing the fan motor, the fan still doesn't run, then replace the sensor.
Run a wire from the positive terminal on the battery to the fan motor. If the fan will not run when hot wired, the motor is burned out and will have to be replaced. If the fan will run when hot wired, check the fan motor fuse. It us probably in the engine compartment near the battery.
The fan motor itself is not serviceable. The fuse, relay, and sensor could be bad causing the fan not to run. Check these before changing the motor.
The fan mounted on the shaft is for cooling of the stator and rotor. If the fan stops the motor gets overheated and burns out.
faulty thermostat, stuck fan relay, bad fan motor, no voltage to motor, bad circuit board, bad run capacitor...
If the relay is good and the fan is getting power and groun, then the fan motor is bad.
Apparently you are having an overheating problem and you suspect the radiator cooling fan. First thing you want to check is if the thermostat is not stuck closed. Open the hood, remove the radiator cap and start the engine. When normal operating temperature is reached, carefully look into the radiator filler neck. You should be able to see water circulating. If the fan motor doesn't come on by that time, then it could be that the radiator fan sensor switch or the radiator fan motor are at fault (maybe even both). After the engine cools down, wire the fan motor direct to see if it will run, if it does, replace the sensor switch. If the fan motor doesn't run, replace the fan motor before you buy a new sensor. If after replacing the fan motor, the fan still doesn't run, then replace the sensor. You don't have to run the engine to an overheating point to see if the fan will run, it should come on when the engine reaches normal operating temperature.
Check the run capacitor, if defective, can cause the fan motor to run hot and stops till cools off, on n off. And the sound is a little different while running, it is hard on the motor.
The fan motor is controlled by a thermostat. When you turn off your car if the water temperature is higher then the thermostat is set for. the fan will continue to run until the temperature comes down then shut off. If the thermostat is faulty the fan will either run continually or not at all.