Rick's Free Auto Repair Advice

Posts Tagged: blend door calibration

Chrysler Heater A/C Control Calibration Routine

The blend and mode doors on late model Chrysler vehicles are driven by DC servo motors. If the motors get out of synchronization, the control head doesn’t know where they are. That can result in cold air when you command heat and vice versa. It can also screw up where the air blows. Here’s how to perform a calibration routine on Caravan, Voyager, and Town and Country. It works on many other Chrysler products as well. 1. Turn Ignition switch to ON 2) Press both the POWER and RECIRCULATE buttons … Read More


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