TM 9-2540-207-14&P F8 - IGNITION FLAME OUT F8 During Start Up, the burner temperature has dropped below normal operating limits and the Heater is unable to re-establish ignition CHECK/POSSIBLE CAUSE REF. REPAIR 1 Check for carbon build-up in 4.4.1 Clean carbon from Igniter Holder Igniter Holder Restart Heater 2 Check that Igniter Hatch is 4.4.1 Install Igniter Hatch installed correctly Restart Heater 3 Check that Wire is Connected 4.4.1 Check spring washer on Igniter post. to Igniter Place wire on Post Replace Hatch Cover Restart Heater 4 Defective Igniter 4.4.1 Replace Igniter Restart Heater 5 Check fuel system and fuel 2.6 Reconnect fuel system, remove all supply unnecessary bends and fill fuel tank with fuel Restart Heater 6 Check for obstructions in all Remove obstructions ducting to the Heater Restart Heater 7 Check for carbon build-up on 5.3.7 Clean Burner Fuel Shaft Burner Fuel Shaft 8 Check for carbon 5.3.7 Remove carbon and clean Burner Housing accumulation or obstructions in Burner Housing 9 Defective Flame Tube and 5.3.2 Replace Flame Tube and Burner Chamber Burner Chamber 5.3.5 Restart Heater 10 Defective Burner Housing 5.3.7 Replace Burner Housing Restart heater 11 Defective Fuel Injector 5.5.5 Replace Fuel Injector Restart Heater 12 Defective Logic Wiring 5.5.6 Replace Logic Wiring Harness Harness Restart Heater 13 Defective Electronic 5.2.5 Replace Electronic Programmed Controller Programmed Controller Board Restart Heater 6-28