WHILE DRIVING THE AIR CONDITIONER FAILED AND THEN THE VEHICLE SHUT DOWN. DRIVER WAS ABLE TO RESTART VEHICLE AFTER APPROXIMATELY 10 MINUTES. THE NEXT MORNING, A TOW TRUCK DRIVER CRANKED THE VEHICLE AND DROVE IT ONTO THE TOW TRUCK. BEFORE THE VEHICLE WAS SECURED TO THE TOW TRUCK, IT BEGAN TO SMOKE FROM UNDER THE ENGINE AREA AND SUDDENLY IT BURST INTO FLAMES.