2008 navigator fan blows high as long as the car is started and won't turn off.

SOURCE: Air Conditioner

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Courtesy Nissan Parts part cost is $109.00
http://www.courtesyparts.com/module-asm-p-320795.html
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http://forums.nicoclub.com/zerothread/280961

PART NUMBER INFORMATION
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The part number is: 27761-70T03 Module Assy-Pow
It is officially called an AC Blower Amplifier.

It cost me $153.32 + tax (not concerned about getting the best price since having the fan on high all the time drove my wife nuts for the two days it was acting up!)

One other suggestion... you're gonna have to take apart the glovebox door and compartment behind it (easy enough). While back there, change out the cabin filter (another Nissan item) since you will have everything apart anyway. Kill two birds with one stone. That thing (if equipped, gets really nasty).

SOURCE: 2000 Ford F-250, Fan switch/ blower motor...

sounds like blower motor resistor is shot.

Testimonial: "Good call. That did it. Thanks "

Mike Butler

• 6674 Answers
• Posted on Jun 01, 2009

SOURCE: FAN DOES NOT BLOW AIR OUT ON LOWER SETTINGS ONLY ON HIGH

Need a new blower motor resistor. Check under hood on firewall, on passenger side under cowl, behind strut tower area is usual spot. If not may be on housing/ducting under dash on passenger side near blower motor.

SOURCE: THE A/C BLOWER MOTOR ONLY RUNS ON HIGH SPEED, THE

could be one of two problems either the switch for the fan motor or the motor itself u would need a 12volt test light to check ground one side light and touch the switch connector wires one by one until light comes on this is the main line then turn switch to the 1st speed u should get a light on another wire if switch is working repete for all speed selection if it works then the motor is bad

SOURCE: ac fan won't turn off

In my 2001 Town and Country without automatic temperature control, my heater/AC blower suddenly worked only when set on high. Usually, that problem is your blower resistor pack.

I had to search for the one in my van since the parts man wasn’t sure where it was except that he thought it was in the dash somewhere. (In some other vans it was under the hood.) My Haynes manual didn’t have anything on it except a picture showing it with the blower. I found it directly behind the glove compartment. Very easy to get to once you know where it is.

The glove box can be lowered all the way out of the way just by pulling in the sides so the rubber stoppers come out toward you. The sides bend easily to allow that.

The glove box being out reveals the resistor in the heating duct right in front of you. Just remove the two sets of wires and two bolts (10mm socket, I think) and the resistor pack slides right out. Then bolt in the new one an plug the wires back in (they only fit in one way). Fold the glove box back up and press the stops in to get them back in place and you are done.

The resistor pack only cost $12 and change at my dealer. It is part number 1-04885583AB which was a replacement for the same number with AA at the end, so I’m guessing they had a lot of trouble with the AAs and so made a better AB.

Last Winter my heater blower fan worked only on High. I changed the front heater/AC blower resistor pack and was surprised at how easy it is, but I had to figure it out for myself since my Dealer's parts guy was no help as to where the part lived and my Haynes manual was just plain wrong. This was on a 2001 T+C. I'd be very surprised if the 2001 Caravan was any different. Don't know what other year vans would be the same. I do know some earlier generations had this resistor under the hood and Haynes had is with the blower sort of behind the instrument cluster.