Resistor most common or the motor for the squirrel cage itself. The resistor makes it possible to run at different speeds. you need a wiring diagram, then bypass with jumpers to determine.
fix it
Check your fuse boxes.
It is likely the duct work how ever it can be the fan has come off the fan motor
Blown fuse, defective blower motor resistor pack, defective blower motor, a bad switch, or disconnected or loose wiring.
I would look into the blower motor resistor module
Replace it. This is probably a sign of badly worn bearings that make it difficult for the motor to spin.
Yes as long as its the same engin
Because its broken
Blower Motor Resistor is bad. 20.00 part at AZ.
Replace blower motor resistor usually located in the duct work or out in engine compartment in ductwork by heater motor.
fuse or relay most likely
If you are referring to the blower motor speed, and only the highest setting works, then the problem is a bad Blower Motor Resistor Pack.