Google doesn't help much but the link to the manual did. I read the AC is on over 38 degrees F automatically and I don't think you can turn it off. The "auto" button, once it's pressed, will adjust the fan speed to reach the manually set temperature faster. Once it reaches that cabin temp, the fan will go down to low until you change the temperature setting again. I've tried this and found once the fan speed automatically goes to low, if I change the temperature setting by one or two degrees, the fan won't go high because it is not needed to reach the couple degree difference.
Of course you can manually adjust the speed if you want but the "auto" is pretty accurate. When I start to get chilly, it will lower the fan speed. I hope I explained what I've learn well enough. Thanks a lot for the .pdf link, it was very helpful.
