A/C Switch
WARNING: This page is about a different car, the 2001 Subaru Impreza and 2000 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Remove A/C-heater control panel from dashboard. See HEATER CONTROL PANEL under REMOVAL & INSTALLATION. Turn A/C switch on. Continuity should exist between terminals No. 1 and 2. See Fig 1. If continuity is not as specified, replace A/C-heater control panel.