[200q20v] Subject: Audi C1

[C1J1Miller at aol.com]

>My problem seems to be that the radiator fan would not come on
>(at all). I checked the fuse, it is fine; but the electrical connection (3
>wires) at the temperature switch attached to the radiator is not getting
>any voltage (none of the three wires have it). My first impression was to
>replace the temp switch, but with no voltage in the wires that doesn't seem
>to be the problem.  Unfortunately I don't have a service manual.  Any
>advice on where to begin the investigation?  Thanks a bunch.
>
Your radiator fan never works?
If you set the climate control to "auto", does the low speed fan come on?  No voltage to fan motor?

Have you run the diagnostic procedures off the climate control head?  Some of this is on my site; the rest is in the Bentley repair manuals.

Scott Mockry's site also provides some detailed diagnostics for the radiator fan, and control circuits:
http://www.sjmautotechnik.com/cooling.html

this should get your fan operational again.
hth, chris miller, windham nh, c1j1miller at aol.com
'91 200q20v ==> http://members.aol.com/c1j1miller/