AT 9:20 MONDAY MORNING 6/25/18 MY 2006 F-150 HAD BEEN SITTING STATIONARY, UNOCCUPIED AND TURNED OFF FOR 3 AND HALF HOURS. I WAS WAKEN UP BY MY WIFE TELLING ME MY TRUCK WAS ON FIRE. THE FIRE HAD BREACHED THROUGH THE HOOD AND CONTAINED TO THE ENGINE COMPARTMENT. I HAD NO PRIOR TROUBLE TO THE OPERATION OF MY TRUCK THAT WOULD INDICATE A PROBLEM. THE FIRE DESTROYED ENTIRE FRONT OF TRUCK.