Reprogram HVAC in RAM to fix Defrost Problem

Jan. 11, 2023

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.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Mike Mavrigian

Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.