+1 my 32 did the same thing, its the interior temp sensor, when faulty or un plugged the sensor reads -32 degrees so it blows hot air to save your life!
on the center panel you will see the little slots behind that there will be a sensor with a plug on it and a bendy hose, both of thse need to be attached for it to work, the hose is a flamin mongrel because it is only just long enough to reach the back of the sensor when the console is in place, if you need a hand with it let me know, im very familiar with having to deal with this issue lol