Temperature Control Knob
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford F-Super Duty, 1995 Ford Cab & Chassis, and 1995 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
Temperature is controlled by cable-operated blend-air door in plenum assembly. With temperature control knob in "C" (cool) position, all air is directed around heater core. See Fig 1. With temperature control knob in "W" (warm) position, all air is directed through heater core. When temperature control knob is between cool and warm positions, air is directed both through and around heater core.