I have the A/C running after a couple of summers w/o.  Subie yes, but the
van has always done this.  The high fan speed comes on when it shouldn't be
required (as far as I understand).

Sunday it was parked for about two hours on an 85 deg. Day.  When I started
it the high rad fan came on immediately  and stayed on for at least ten
minutes as I drove home.  Came on and off a few times.  The temp guage
didn't show the H20 temp even to half way to the LED.

Turn the A/C off and the hi fan stops.

Other times it has just come on at high speed, even though it was no way
near hot.  Stays on for a minute then shuts off.

W/O the A/C the high speed fan never has to operate due to high temps.

So, what controls the high speed fan when the A/C is on?

Thanks for any tips.

Tom Salicos
'87 Syncro Westy EG-33