2010 KIA Forte - When I get in the car first thing in the morning (Florida so not exactly freezing) I turn on the defroster no light however I can hear a click and it does defrost the rear window. No A/C light and the blower blows hot air. About 30 minutes in on the ride to work, the A/C kicks in , light comes on, and blows cold. Now the strange part - If the car sits in the hot sun lets say until after 11-12 o'clock the A/C works like normal. ?? On a sunny hot day I leave work and it works fine.