Why is my 2018 Chrysler Pacifica touch screen not working?

The reason Your 2018 Chrysler Pacifica's touch screen isn't working is largely dependent on the way that the touch screen failed. The first question I'd ask is if there's any visible trauma to the screen -- this seems obvious, but it's something that people overlook. If the digitizer beneath the screen is damaged, it may not accept touch inputs. Alternatively, You may be looking at a failed connection somewhere in the system -- this usually manifests as a black screen, with no power to the system. If You see an all blue screen, this indicates a software issue -- You may have to re-flash the original software back onto the head unit in order to proceed. This can be done through most dealers, but it's difficult if not impossible to do Yourself. Could You give us some more information on how the touch screen isn't working