[s-cars] electric cooling fan operation

[ron kirkham]

So yesterday I had my '93 S4 idling next to my idling '95.5 S6A. Both had
the A/C on at the time and I noticed that the S4's electric cooling fan was
not running and the S6A's was. Both cars were cold as this was early AM,
maybe 60f. What should be happening when the A/C is on and when does/should
the fan(s) kick into high?  I drove the S4 later in the day, about 90f and
still no fans with A/C on.

I'm wondering if my S4's fans have ever worked correctly since I don't
recall the fan EVER kicking into high mode. I've never had cooling problems
on the S4, but since I bypassed the leaking heater core last month, it has
been running a little hotter. Just past the fat mark at 11:00 on the dial
and hotter yet when not moving.

I recall a test for the switch by jumping the posts?, but can't find the
info I thought I had saved.

Info. appreciated.


Ron
'93 S4 248.5k