Subaru Legacy 2002 Service Manual page 2745

HVAC System (Heater, Ventilator and A/C)
4. CONTROL UNIT (AUTO A/C)
(1) Control panel
(2) Circuit ASSY
(3) Electronic control unit
GENERAL DESCRIPTION
S701001A0508
(4) Control case
(5) Incar sensor
(6) Aspirator hose
AC-12
(7) Bulb
B4M2455A