Don't know but it sounds something like this.
Make : DODGE Model : CARAVAN Year : 2002
Manufacturer : DAIMLERCHRYSLER CORPORATION
Service Bulletin Num : 2400702 Date of Bulletin: AUG 05, 2002
NHTSA Item Number: 635697
Component: VISIBILITY
EFROSTER/DEFOGGER SYSTEM
Summary:
SUBJECT REGARDING AIR CONDITIONER TEMPERATURE DIFFERENTIAL (STRATIFICATION) BETWEEN LEFT AND RIGHT FRONT PANEL OUTLETS. *TT
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