Subaru 2003 Legacy Owner's Manual page 180

Select the air inlet by pushing the air inlet selection switch.
: Interior air recirculates inside the passenger's compartment.
Use this position when quickly warming up the passenger
compartment or cooling it down or when preventing outside
air from entering the passenger compartment from the out-
side air. The indicator light "
comes on when this switch is pushed.
: Outside air is drawn into the passenger compartment. When
the air conditioning system is operated in the "AUTO" mode,
this position is selected automatically. The indicator light
"
pushed.
n Temperature control dial
4-18
HB4032BB
" on the control panel comes on when this switch is
HB4033BB
" on the control panel