Blend/Mode/Recirculation Door Operation Improper

WARNING: This page is about a different car, the 2002 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes:

Check for Actuator Circuit Test DTCs.
Check for active HVAC DTCs.
Check for HVAC door recalibration DTCs.
Mode Door Actuator/Linkage/Door.
Blend Door Actuator/Linkage/Door.
Recirculation Door Actuator/Linkage/Door.

CAUTION: Always turn ignition off before disconnecting or connecting any control module connector. Failure to do so could result in damage to control module.

NOTE: Ensure vehicle being tested has a fully charged battery. If it does not, false symptoms may occur.

NOTE: For component location, see appropriate illustration under COMPONENT LOCATIONS . For terminal identification, see appropriate illustration under CONNECTOR IDENTIFICATION . For circuit and wire color identification, see WIRING DIAGRAMS . For component removal and installation procedures, see appropriate component under REMOVAL & INSTALLATION .

NOTE: All Actuator circuit and Overcurrent DTCs must be diagnosed and repaired before diagnosing Calibration symptoms.

Testing:

Turn ignition off. Connect DRBIII(R) to DLC. Turn ignition on. Using the DRBIII(R), select HVAC, SYSTEM, then actuate the Actuator Circuit Test. Does the DRBIII(R) display any Actuator Circuit Test DTCs? If yes, perform appropriate DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
Using the DRBIII(R), read active HVAC DTCs. Does the DRBIII(R) display any active HVAC DTCs? If yes, perform appropriate DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
Using the DRBIII(R), select HVAC, SYSTEM, then actuate the HVAC Door Recalibration Test. Does the DRBIII(R) display any HVAC Door Recalibration Test DTCs? If yes, perform appropriate DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
For which door was fault reported? For Mode Door, go to next step. For Blend Door, go to step 6 . For Recirculation Door, go to step 7 .
Start the engine. Turn Blower Control to high speed. Turn Mode Select Control to each door position for at least 30 seconds and check for airflow from the corresponding vents. Does air flow from the correct vents for each door position? If yes, test is complete. If no, remove Door Actuator from A/C-Heater Housing assembly. By hand, attempt to rotate the Door Actuator in both directions. Also, inspect for disconnected, missing or broken Door Actuator Linkage. Repair as necessary. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.
Start the engine. Turn Blower Control to high speed. Turn Mode Select Control to the Panel position. Turn Blend Control to the full hot position. Turn Blend Control to the full cold position in 25 percent increments, while checking for a change in airflow air temperature coming from the Panel Vents. Does airflow air temperature change with respect to position of the Blend Control? If yes, test is complete. If no, remove Door Actuator from A/C-Heater Housing assembly. By hand, attempt to rotate the Door Actuator in both directions. Also, inspect for disconnected, missing or broken Door Actuator Linkage. Repair as necessary. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.
Start the engine. Turn the Blower Control to high speed. Turn Mode Select Control to the Panel position. Turn Mode Select Control to MAX panel position. The sound of the air flowing through the ducts should get louder as the Recirculation Door opens to bring in recirculated air. Does the sound of the airflow get louder after turning the Mode Select Control to MAX panel position? If yes, test is complete. If no, remove Door Actuator from A/C-Heater Housing assembly. By hand, attempt to rotate the Door Actuator in both directions. Also, inspect for disconnected, missing or broken Door Actuator Linkage. Repair as necessary. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.