Blower motor bad.
Blower resistor bad.
Switch bad.
Fuse blown.
try a blower motor resistor
blower module on blower/ evap case
Same problem on mine...I had the blower motor module replaced and it works great.
I replaced the battery in my 1993 sundance noe the starter will not ingage
Try the fuel filter and the fuel pump relay
Should under dash on firwall near blower motor.
Either the switch or resister network has failed and needs to be replaced.
When you find out let me know I have same problem replaced blower fan and resisitor did not work. I have a blazer zr2 2002
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.
Blower motor control relay under dash behind blower motor is bad or has water in it from cabin filter port.
Check the 30 amp Blower fuse. If not that check the fan relay, if not that check the blower motor directly from a jump on the fan itself.
If the blower motor continues to run after disconnecting the control head and its wiring, the issue may lie in a faulty blower motor relay or a short circuit in the wiring. Additionally, a malfunctioning temperature control module or a stuck blower motor switch could also cause continuous operation. To troubleshoot, check the relay and inspect the wiring for any signs of damage or shorting. If these components are functioning correctly, the blower motor itself may be defective and require replacement.