Common causes, blower motor resistor, blower motor, wiring or controls
If it's a fan speed issue check the blower motor resistor & the blower motor. Check the plugs at the resistor and blower motor for burn marks also.
Could be,Blown fuse,Bad blower motor,Bad blower motor switch,Bad blower motor speed resistor,
Should under dash on firwall near blower motor.
where is resistor pack on 2010 impala lt 6 cylinder 3.5 motor
Blower motor control relay under dash behind blower motor is bad or has water in it from cabin filter port.
Same problem on mine...I had the blower motor module replaced and it works great.
Check the blower motor to make sure its working propable
Blower motor bad. Blower resistor bad. Switch bad. Fuse blown.
Check for loose wire connections also Defective blower motor or resistor pack. Blown fuse or defective blower motor switch.
Getting power to motor? if so could be a bad motor if not could be bad resistor pack or bad switch
Could be, a bad blower motor, a blown fuse, a bad resistor, a bad switch, damaged wiring,
The blower on a 2002 Nissan Pathfinder won't turn off if the switch is stuck in the on position or the relay is defective. Removing the blower fuse will cause the fan to turn off.