Dodge Caravan 1998 air conditioner

Likely blend air door problem--low vacuum=leaks or bad actuator.

It is due to the hvac being out of calabration. On the left side of the A\C control panel hold down the top and bottoms buttons with the engine running, high blower, panel, full cold (both levers if so equipped). When the lights on the panel come on solid and then start flashing release buttons. It will take about 2 mins or less for it to calibrate. If only the top left button is flashing you are done. Press that button once or restart van all function should be normal.

Flashing HVAC lights after new battery Car Forums and Automotive Chat

Have the body control module tested.. Look for chaffed wiring harnesses near where body was modified .

do you rear controls

Change or Clean out the Fresh Air intake filter for the Interior Air flow.
Regards, DT

You could do 2 things...have the codes read and reset at a parts store or try to take both wires off the battery and try to reset the codes.

The procedure for re-setting the HVAC control panel on a 1998 Dodge Grand Caravan follows:
With ignition on but not running
1. turn knob to air vents
2. turn fan knob to ON
3. temperature setting on COLD (2X) {I have dual temp controls}
4. hold top(rear wiper) and bottom (rear wiper with wash) buttons pressing down together until all the buttons cycle through (this will require 1 to 2 minutes of continuous pressing)
Hopefully, this also applies to 1997 version. I learned this from a very helpful local Dodge service adviser

I have a 2004 Dodge Grand Caravan SXT. I had the same problem and had a auto shop replace the thermostat and my AC works just fine now.

http://www.allpar.com/fix/codes-climate.html