Ram Trucks 2013 3500 - Owner Manual - Manual (Page 322)

MAX A/C
For maximum cooling, when MAX A/C is selected the
A/C is turned on automatically and the air is
recirculated.
NOTE: A/C cannot be deselected when in MAX A/C
position. The LED will blink three times if the A/C
button is pushed.
Manual Climate Controls With Touch-Screen — If
Equipped
Hard-Keys
The hard-keys are located below the radio touch-screen.
Climate Controls — Hard-keys
320 UNDERSTANDING YOUR INSTRUMENT PANEL