This bulletin applies to 2014 Dodge Ram 1500, 2500 and 3500 vehicles, equipped with an 8.4-inch touchscreen display, built on or before Jan. 27, 2014. The front defrost button does not respond at times. The remedy involves selectively erasing and reprogramming the HVAC control module with new software, using release 14.02 or higher.
The customer may experience a situation where the touch screen climate controls may ignore the first press of the front defrost button if it is the first climate button pressed after ignition ON. The second press of the defrost button may work properly. If another climate button is pressed prior to the front defrost button, then the control may respond as desired.
Using a scan tool, verify all HVAC systems are functioning properly. If DTCs are found, record and correct prior to reprogramming.