radiator fan switch

[David Head]

One tip - if the fan runs in low, assuming some monkey lad has not switched the leads around this guarnatees the resistor pack is good. Also there is a pressure switch in the AC system that forces the fan to high regardless of temp.

Konstantin Bogach wrote:

> It is the sensor screwed into radiator right under lower hose (or maybe above lower hose, sorry, I don't remember).  It has 2 switches in it.  One is for stage 2 and another for stage 3, if I understand correctly. Stage 1 is controlled by AC controller.  If  the fan is not ON  in stage 2 (med. speed)  then possible culprits are:
> a)  radiator termoswitch
> b)  stage 2 relay
> c)  resistor pack (which makes lower voltage across the fan's motor for stages 1 and 2).
>
> Konstantin Bogach
>
> > From: Howarth1 at aol.com
> > Date: Mon, 15 Oct 2001 22:32:00 EDT
> > Subject: Thermoswitch for the cooling fan.
>
> > Which sensor is the one for the radiator cooling fan on a 1990 model 100 (2.3 SOHC).  Where else should I look if the fan will run on low with the A/C in Auto but will not kick on in econ as the temp gets high? Does that thermoswitch have two threasholds, in other words, how does the fan get the signal to go from off to med to high?  Thanks.
> >
> > Richard Howarth
> > 1990 100
> > 1990  90
> > 1986 4000
> > 1986 5000 CS Turbo
> >