Thanks Jim- I've always admired your web site and appreciate your participation on these forums!
I think I might have been a bit hasty- the center vent temp settles out at around 42 degress with an abmient OAT of around 80 or so. I think it has more to do with the big black car and black interrior syndrome.
I'm still a bit perplexed by the constant cycling of the aux fans though. They're more like 5 seconds on- 15 seconds off- over and over.
PS Does the same procedure in menu #15 apply to the later model ACC?
Thanks again!
Paul Hansen