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The genuine OEM Lennox 13T94 oil burner arm (factory part number 100195-08, series 1812) is a critical alignment component inside the oil burner assembly of Lennox oil-fired heating systems. It holds the electrode and nozzle assembly in the exact position required for correct fuel atomization and spark ignition, ensuring a clean, consistent flame throughout every burn cycle. Its factory dimensions guarantee a direct fit within Lennox burner housings.
Common failure symptoms: A worn, bent, or corroded burner arm typically shows up as hard or delayed starts, rumbling or pulsing combustion, excessive soot, oil odors, and repeated safety lockouts at the primary control. Even slight misalignment of the electrodes or nozzle can degrade the flame pattern and drive down efficiency.
Why OEM matters: Generic replacement arms rarely match Lennox electrode gap and nozzle-depth tolerances, leading to unstable flames, sooting, and premature wear on adjacent parts. Installing the factory 13T94 arm restores precise burner geometry and reliable ignition on your Lennox unit. Verify the part number against your original arm before installation to ensure correct series compatibility.