Chrysler's Dodge Caravan minivan can be supplied with an automatic climate control system as opposed to the normal manual system. In the automatic system, the temperature is controlled by two infra-red sensors that measure the surface temperature of the driver and passenger and adjust the ambient temperature and air flow accordingly. If you have issues with the automatic climate control system on your Caravan, there are a few ways you can troubleshoot the problem.
Dial in the temperature, then set the system by pressing the switch marked "Auto" to the high or low position so that "Auto" appears on the display. Unlike a manual climate control system, the automatic system is best set once, and then left alone.
Add antifreeze if the engine overheats while you use the automatic climate control in summer. Use a 50% solution of ethylene glycol antifreeze and water, and add it to the labeled coolant container under the hood. Add the antifreeze-mix if the heater and demister don't work properly in the winter.
Turn the "Recirculation" mode off if you're not using air conditioning and the windows fog on rainy or humid days.
Clear leaves and other debris from the vents below the windscreen if the system still doesn't work properly. The automatic climate control is dependent on air flow, and leaves or snow on the vents will hinder that flow.
