Here in FL we have our first 'cold' spell. I did not need A/C this morning, and didn't want to use heat, just an open vent to the outside air to cool the solar heat gain. It appears that there is either A/C or heat, all automatically adjusted by the car. No 'vent' position. You can turn off A/C but from the wattage increase it appears that the heat automatically goes on when outside temp is below the 'Lo' setting. Is there a way to open the vents? (Other than opening a window...) Thanks.