Any fix for LS400 air conditioning problem?

I bought a new LS400 in Feb. 1990 and drove it for seven years. There
never was any "failure" during that period, but the car had one very
annoying characteristic: On hot, sunny days (over 90 deg. f), the air
conditioning would pour out super cold air and never back off. You had
to turn off or reposition the vents to keep the unpleasantly cold air
from blowing on you, and the velocity of the air was way too high.
Cranking up the temp set point did little until near upper limit.

Well, I bought a new 1999 LS400 in July 1999 and lo and behold, it does
the exact same thing!! I thought for sure they would have learned how to
design an air conditioning system over 10 model years. I've had a
number of luxury GM cars over the past 35 years and none of them had a
problem anything like this.

It seems that if you crank up the temp set point to the upper limit,
then gradually drop it down while driving, if will give better control.

Lexus dealers feign total unfamiliarity with this "issue."

I'll bet someone on this message board knows what I'm talking about.

???