merury villager and Nissan quest both use a fan resister located near th blower motor underneath the glove box. L,M,MH operate on resistors and high speed bypasses the resistor so your resistor plug is burnt out on the first three speeds if you still have high speed.if you have no fan on any speed then you have another problem.
Possibly resistor pack on blower motor needs replacing
Your heater switch may not need to be replaced. The heater high position is controlled by a fuse under the hood. Until you find the fuse and replace it, your new switch will not work. JRR.
possibly a blower motor. or switch
either the switch or the fan motor
Defective blower motor resistor pack.
replace the blower fan resistor located under the dash behind the glove box
No it does not
it is the blower motor resistor. it works on high because on high it bypasses the switch
The drive switch to the lower right of the steering wheel has 3 positions: Left to right they are A4WD, H4WD and L4WD. When the switch is in the H4WD position, you are in High 4 Wheel Drive.
Its probably the throttle position switch.
Why are you replacing the switch? If the fan works only on high speed, replace the fan resistor. There was a TSB for this.
Blower switch and connection had a melt down.