TL* THE CONTACT OWNS A 2003 FORD RANGER. AFTER STARTING THE ENGINE AND TURNING ON THE HEATER, SMOKE AND FLAMES WERE PRESENT INSIDE THE VEHICLE COMING FROM THE DRIVER'S SIDE VENTS. A FIRE EXTINGUISHER WAS USED TO EXTINGUISH THE FLAMES. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. AUTONATION FORD MOBILE (901 EAST 1-65, SERVICE RD SOUTH, MOBILE, AL) AND THE MANUFACTURER WERE NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 150,000. THE VIN WAS INVALID.