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Reprogram HVAC in RAM to fix Defrost Problem

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Selectively erasing and reprogramming the HVAC control module with new software is required. The wiTECH software level must be at release 14.02 or higher.

| Photo Credit: Chrysler

This bulletin applies to 2014 RAM 1500, 2500, 3500 and 4500/5500 trucks equipped with an 8.4-inch touchscreen display. The front defrost button may not respond at times. The touch screen s=climate controls may ignore the first press of the defrost button if it is the first climate button pressed after ignition on. The second press of the button may work correctly. If another climate button is pressed prior to the front defrost button, the control may respond as desired.

Selectively erasing and reprogramming the HVAC control module with new software is required. The wiTECH software level must be at release 14.02 or higher. Perform the Actuator Calibration Test routine found under the System Test tab in the HVAC control module view in the wiTECH Diagnostic Application. After HVAC programming is complete, clear any DTCs.

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