The "codes", are they attainable from the on board diagnostics or do I need to plug her up at the dealer?

The HHT readings were taken on the cars first start up since yesterday. It's about 90 degrees out when I took the reading, around noon time when I started her up. It took me approximately 3 mins to figure out how to scroll to value "07" where I took the reading of 4.0. Engine off, posted the reading.

I can post the other values if it can shed more light on the matter.

Sokoloff, whom I have chatted with, with his identical experience

in thread 210 chassis climate control problem

in a nutshell, had to replace the sensor 210 830 05 72 under the dash and after reprogramming the climate control unit it did the trick. I am not sure though, I need to clarify if refrigerant was ever the issue.

Thanks all for your input and hopefully things will work out