Work Performed: Responded to no heat call for 11-year-old Lennox 2-stage furnace showing ignition error. Observed normal ignition sequence, but flame did not consistently reach the flame rod and appeared to “snuff out” during multiple attempts. Inspected burners and orifices, removed gas piping, and cleaned burners—no major concerns found. Tested ignition with burner door off and confirmed successful ignition. Suspected restricted intake due to long vent run with multiple elbows, windy and leaves blowing everywhere. Cut and inspected intake line from inside and blew out the entire intake using a leaf blower to remove possible debris or leaf blockage. Reconnected intake and cycled furnace multiple times under normal conditions—furnace fired and ran smoothly each time. Results: - Furnace ignition now consistent and reliable. - All readings and operation within specifications. - Suspected debris obstruction in intake resolved. - Recommended monitoring performance to ensure