In my 2004 Dodge Caravan, if the heat-A/C system selector is set to any (ventilation output) position other than defrost, I can slide thetemperature selector all the way down (cold) and all I'll get is untreated outside air unless I deliberately hit the A/C button. However, if the selector is turned to the defrost (windshield) position, the A/C will automatically come on if/when the temp selector gets close enough to the cold end. Is there any way to disable this automatic connection between the A/C compressor clutch and the defrost selector? I'd really like to be able to get just plain outside air through my defroster vents and I can always hit the A/C button if/when I want A/C (just like for any other ventilation position on the selector dial). Thanks.