My KIA's climate controls on console are not working. Winter is comming and I need to fix it before it gets too cold. There are 3 buttons - AC/circulate air/bring in fresh air. None of these controls show power. It has three dials: One for amount of air, one for hot/cold and one for which vent to choose. The only dial that works is the one that controls air volume. Which only blows outside temp. I checked the control rod under passenger dash and it was connected, but the mechanism it controls was Stuck hard! I manually turned the piece by hand slightly and could feel the heater blowing hot air, so heater work, just seems to be an electrical problem. Please help me on where to start.