What it does is turn fans on HIGH whenever A/C is selected.
I haven't seen much higher than 210-215 in this mode.
In track situations also pull A/C clutch switch and the fans run HIGH with no A/C. It does give "service engine soon" light.
Originally,my Viper Tech said fans would probably burn up as they are not designed to run High all the time. Well, that
was about 1 1/2 years ago and 19,000 miles ago and so far he is wrong! 2 minute install $10 total cost!