Reset HVAC

After getting a new PCM installed a few weeks ago, the rear window defroster switch light began blinking on and off. The dealer said the HVAC system needs to be reset/recalibrated, but they could not do it at the time. Does anyone know how to reset the HVAC? I know the old Voyager/Caravan minivans used a sequence of pressing and holding certain HVAC buttons to get the system to test itself and reset itself, but I haven't been able to find anything on how to do this on a Durango.

By the way, I have a 2001 Durango SLT-Plus, with the dual-climate control.

Thank you!

they need to perform a cool down test with the drb