Recirculation Control Switch
WARNING: This page is about a different car, the 2001 Acura Integra, 2000 Acura Integra, and 1999 Acura Integra. However, it is still accessible from the selected car via links, so may be relevant.
With fresh/recirculated air button in fresh air position, continuity should exist between terminals No. 4 and 6. See Fig 1 . With button in recirculated air position, continuity should exist between terminals No. 4 and 5. If continuity is not as specified, replace heater control panel.