TM 9-2540-207-14&P F2 - BURNER FLAME OUT F2 During Run-operations the burner temperature drops below normal operating limits CHECK/POSSIBLE CAUSE REF. REPAIR 1 Check if vehicle fuel filter is vehicle Replace fuel filter plugged TM Restart Heater 2 Check for air bubbles in the Bleed air from fuel lines. fuel line. 3 Check to see if fuel line Straighten fuel lines and remove leading to Heater is pinched or obstructions obstructed Restart Heater 4 Check that there is ample fuel Fill fuel tank with fuel supply Restart Heater 5 Check for obstructions in all Remove obstructions heater ducting Restart Heater 6 Check for carbon build-up on 5.3.7 Clean Fuel Shaft Burner Fuel Shaft 7 Check for Carbon 5.3 Remove carbon and clean Combustion accumulation or obstructions Assembly in burner 8 Defective Flame Tube and 5.3.2 Replace Flame Tube Burner Chamber 5.3.5 Replace Burner Chamber 9 Defective Burner Housing 5.3.7 Replace Burner Housing Restart heater 10 Defective Fuel Injector 5.5.5 Replace Fuel Injector Restart Heater 11 Defective Logic Wiring 5.5.6 Replace Logic Wiring Harness Harness Restart Heater 12 Defective Electronic 5.2.5 Replace Electronic Programmed Controller Programmed Controller Board Restart Heater 6-22