OEM Lennox Oil Burner Arm — 13U28 (100195-07)

The genuine OEM Lennox 13U28 oil burner arm (factory part number 100195-07, series 1811) is a precision-built component of the oil burner assembly used in Lennox oil-fired heating systems. It holds the electrode and nozzle assembly in the correct position so fuel is atomized and ignited cleanly, delivering a steady, efficient flame throughout the burn cycle. Built to Lennox factory dimensions, it installs directly into compatible burner housings without modification.

Common failure symptoms: If the burner arm is worn, bent, or corroded, expect symptoms such as delayed or hard startups, a noisy or pulsing flame, soot accumulation, oil odors, lower heating efficiency, and recurring lockouts at the primary safety control. Misalignment of the electrodes or nozzle from a damaged arm is a common root cause of poor combustion.

Why OEM matters: Generic arms often fail to match Lennox electrode gap and nozzle-depth tolerances, which can cause sooting, unstable flames, and repeated safety shutdowns. The factory 13U28 arm restores precise burner geometry and dependable ignition on your Lennox equipment. Verify this part number against your existing arm before installing to ensure correct series compatibility.