Test was done after the truck was driven for 15 minutes in “Max A/C” mode.
The vent temp will always be relative to the outside temp. In my situation, it is a 48 deg drop from ambient, which is pretty damn good from an academic perspective...and is perfectly within spec for FCA.
However, I think customers always expect more, but how cold is cold enough? What is a reasonable expectation?
A “reasonable expectation” is that every other vehicle I have ever owned in my life (and I’m 54) or have in my driveway right now can reach upper 30 to lower 40 deg vent temps in 100+ degree ambient conditions! That is an “unspoken” standard! Especially for a truck that advertises such high claims of interior comfort and luxury. My 2016 corvette and my wife’s 2017 Maxima read in the upper 30’s on 100 degree days! THAT, is a “reasonable expectation”. I’ve lived all of my life in either New Orleans or Houston and have never had a vehicle, that after sitting in sun for an hour or more, wouldn’t get you chilly in about 5-10 minutes to where you have to turn down the fan to low because you were already cold. This Ram, if sitting in the sun on 99+ temperature days for anything over 1/2 hour, NEVER gets cool enough to turn the fan down Without the Hack. There is absolutely, without a doubt, a serious blend door issue in this Ram that affects the driver side vents due to their proximity to the heater core. Especially the vent near the driver’s door window.
Whatever solution FCA comes up with, is probably going to be blend-door or heater core isolation valve related.