This is also the first place to look if the blower does not work at all.

Esp if the failure followed a heavy snow and the cowl intake was not cleared
prior to using the car.

In that case, the thermistor has opened up due to overheat because of
insufficient airflow.



opined in ups.com:

> When then heater or air conditioning blower fan only works when in the
> high position, the most likely cause is the blower motor resistor. The
> one in my 2002 Ford Mustang failed when the car was only about 3 years
> old. Probably moisture caused it to fail, the part was very rusty when
> i removed it. I found one online for only about $11 at
> http://www.parts.com/partlocator/ind...?siteid=213787 Or you can
> just go to your local ford dealer and get one. Don't let them convince
> you to see the car or tell you something else is wrong or that
> electrical parts cannot be returned. Buy the part and replace it, It's
> a 3 minute job!
>
> This resistor is located on the inside of the car just below the glove
> box attached directly to the blower housing. If this link is still
> valid here this diagram is accurate for most fords;
> http://autorepair.about.com/library/...s/bl384lib.htm --------
> Just look under the glove box and you will see it. It is screwed into
> the housing by two screws; one connector is plugged into it. Don't be
> fooled by the term resistor, this part does not look like a resistor.
> The visible side has a male connector on it and when it is removed the
> inside has whats looks like a small thermistor and 3 different sized
> springs.
>
> Ron Kavchok
>
>



--
- Yes, I'm a crusty old geezer curmudgeon.. deal with it! -