Temperature Control Lever
WARNING: This page is about a different car, the 1998 Isuzu Rodeo, 1998 Isuzu Amigo, and 1998 Honda Passport. However, it is still accessible from the selected car via links, so may be relevant.
Lever controls blend-air door position. Depending on lever position, airflow is directed through heater core (hot setting), around heater core (cold setting) or through and around heater core, resulting in modulated temperatures between full hot and full cold. See Fig 1 .