you might try spraying WD-40 into the bearings of the fan and fan motor, and then spinning the motor by hand a few times. If this does work, you will have to add a regular lubricating oil to the places where you have sprayed the WD-40, as it will dry out fairly quickly. I would recommend using Gunk 'Super Oil'.
sounds like a bad blower motor resistor and or plug
I mean how do you disassemble the fan blower in a 1998 Jeep Grand Cherokee Laredo. how do you remove the blower fan from the car in the Grand Jeep Cherokee Laredo.
The blower motor, or blower motor relay is probably out.
Mine is the same and I was told it is the ac clutch
Blower motor resistors are generally found nearby the blower motor.
check the blower fuse, temperature sensor on the radiator,switch on the dashboard and the blower relay switch.
You either have to much or not enough Freon 134a in the system. You need to either have someone put it on a gauge or find out what the specs are and test it yourself. I do my own and it's no big deal.
behind the washer fluid tank
blower motor bad or no power to it chech fuses blower switch blower motor
access the blower fan from the engine compartment, passengers side, on the firewall, about the easiest blower motor to replace I have ever encountered.
Blower resistor pack broken?