THE PROBLEM WAS ACTUALLY WITH THE BLOWER UNIT COMMON TO THE A/C AND HEATER. THE A/C WAS ON WHEN WHITE SMOKE STARTED BILLOWING OUT OF THE VENTS. I STOPPED THE CAR, AND THE FIRE EXTINGUISHED ITSELF. WHEN I TOOK THE CAR INTO THE DEALERSHIP, THEY INFORMED THAT THE BLOWER HAD CAUGHT FIRE DUE TO ACCUMULATION OF LEAVES AND OTHER DEBRIS SOMEWHERE INSIDE THE VENTILATION SYSTEM. TOTAL COST OF REPAIRS WAS ROUGHLY $1,500. AS THE FIRE DESTROYED THE BLOWER AND OTHER A/C-HEATER COMPONENTS. *AK