Temperature Control Lever

Lower control lever operates blend-air door in heater core housing. At full right position, all air is directed through heater core, providing maximum heat flow. At full left position, all air is directed around heater core providing fresh air. Control can be set in any intermediate position to provide a blend of heated and unheated air. With control lever in "COOL" position, water valve will close (except Wrangler). Mode control lever must be in "HEAT" or defroster mode before any air can enter vehicle.