Low speed relay bad Blower fan resistor Defective winding in blower motor
More than likely the blower resistor is bad....I recently ran into this problem in my 91 Vette...Hope this helps!
it likely is just because of the temperature. The fan should only come on when its needed, such as when its hot out.
Check the spark plugs and starter.
.031 to .035
Check your connection with the fan on/off sensor. Should be located somewhere on the thermostat housing. Sometimes if there is no signal, the fan will stay on (failsafe). Could also be the sensor
usually by the blower motor -- look behind glove box area or under hood near blower motor
the fan blast i37
If your Pathfinder is over heating then you may have an issue with the coolant. You can try adding more coolant to ensure that your car is no longer over heating. You can also double check to make sure your blower is actually cooling your engine.
The 1991 Honda accord blower motor resistor is located on the firewall in the engine compartment. The blower motor resistor will be on the passenger side of the firewall.
behind the glovebox.gm Jim
under the dash on the passenger side.