Dodge 2014 Grand Caravan Owner's Manual page 451

The rear system temperature control is on the front ATC
panel located on the instrument panel.
Pressing the Rear Temperature Lock button on the front
ATC panel, illuminates a lock symbol in the rear display.
The rear temperature and air source are controlled from
the front ATC panel.
Rear second row occupants can only adjust the rear ATC
control when the Rear Temperature Lock button is turned
off.
The rear ATC system is located in the headliner, near the
center of the vehicle.
UNDERSTANDING YOUR INSTRUMENT PANEL 449
Rear ATC Control Features
1 — Blower Speed
2 — Rear Temperature
3 — Rear Mode
4 — Rear Temperature Lock
4