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Hi i have a 4th gen grand caravan with manual HVAC dual zone and have been searching for over an hour for the recalibration proceedure. Was able to find a youtube video for the 3rd ten but nothing on the 4th. I recall seeing a post a few years back, but i can no longer find it. Can anyone provide a link?

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CALIBRATION TEST Description Heater, Ventilation and Air Conditioning (HVAC) control module must be recalibrated each time a door actuator is replaced or when HVAC control module is replaced. It is necessary for HVAC control module to learn feedback voltage values for each door stop position for all doors in front HVAC unit housing, and rear HVAC unit housing (if equipped). If any door actuator is out of calibration, HVAC system will not perform a maximum efficiency. 1. Turn ignition switch to ON position. Simultaneously depress and hold power (PWR) button and recirculation button of front control panel for 5 seconds, then release. LED lights of front control panel will begin to flash when calibration procedure has begun. Calibration procedure should take less than 3 minutes to complete. 2. When front control panel LED lights stop flashing, this indicates calibration procedure has been successfully completed. If LED lights remain flashing for longer than 3 minutes, HVAC control module has detected a fault with actuator door calibration. LEDs will continue to flash until even after ignition switch has been cycled off and on, until a successful calibration test is completed, or until vehicle has been driven about 3 miles.
 

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What about late 4th gens that do not have the power button, it now is the rear wiper button, and the fan control is the power switch, does any one have the calibration procedure for them?
 

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What about late 4th gens that do not have the power button, it now is the rear wiper button, and the fan control is the power switch, does any one have the calibration procedure for them?
Just tried this on my 2007. It worked.
The A/C-heater control module must be recalibrated each time an actuator motor or the A/C-heater control is replaced. If the vehicle is so equipped, the calibration procedure also includes rear HVAC positions for each actuator motor.
Turn the ignition switch to the On position.
If equipped with the manual temperature control (MTC) system, press and hold the Rear Wipe/Wash and Recirculation buttons for at least five seconds. If equipped with the automatic temperature control (ATC) systen, simultaneously press and hold the Power and Recirculation buttons on the A/C-heater control for at least five seconds. The MTC A/C-heater control Rear Wipe/Wash button light emitting diode (LED) and Recirculation button LED, or the ATC A/C-heater control Delay and Recirculation graphics will begin to flash when the calibration procedure has begun.
The calibration procedure should take less than two minutes to complete for the manual A/C-heater control, and less than twenty seconds for the ATC A/C-heater control. When the LEDs or graphics stop flashing, the calibration procedure is complete.
If the LEDs or graphics continue to flash beyond the two minute (manual) or twenty second (ATC) calibration time, it indicates that the A/C-heater control has detected a failure and a Diagnostic Trouble Code (DTC) has been set. Refer to Body Diagnostic Procedures to perform further diagnosis. The LEDs or graphics will continue to flash even after the ignition switch is cycled Off and On, until a successful calibration is completed or until the vehicle has been driven about 13 kilometers (8 miles).
 

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Just tried this on my 2007. It worked.
I have a 2008 Dodge Grand Caravan. I can’t find a “Power” button. I believe it is ATC as it does nothing but squirt windshield washer fluid, when I press the rear window wiper & recirculation button (for MTC).
With no “Power” button, I don’t know what to press.
 
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