More 1990 80Q Blower Fan Woes- Help!

[Turse, Thomas (CORP, GEAccess)]

Hey All,  Haven't posted to the list in a while- the Audi gods have been
fairly good to me so far...knock, knock.  The problem is with the interior
heater/AC blower fan.  I t only works on the 4th/highest setting.  I did my
due diligent research in the archives an came up with the resistor.  I
bought the part and successfully changed it out and it fixed the problem-
for about 2 weeks.  I think the switch is ok, but I'm wondering if there is
anything else- fuse or relay, that may be causing causing the problem.  Any
suggestions would be very much appreciated.

Regards,

Thomas Turse
Denver, CO