I'm not sure if this has been covered before, so excuse me if it has.
When I got my i30, the Radio was reading in Celcuis and the Climate Control was reading Farenheit. I bit confusing to say the least. Since I'm in Australia and we use Celcuis I wanted to be able to read the Aircon in Celcius.
Note: the Radio is easy to find as Temp is in the settings menu.
I couldn't find anything on the forum about this, so I started pushing a few buttons.
If you hold the "Auto" and "Off" buttons for a couple of seconds, it changes from F to C (or vice versa)
Hope this helps those that have a similar situation.