OEM Lennox Oil Burner Arm Assembly — 11C02

The genuine OEM Lennox 11C02 (factory reference R103880-01) is the burner oil arm assembly used in Lennox oil-fired heating equipment. This component carries and positions the fuel delivery hardware within the combustion chamber, ensuring the oil nozzle and electrodes stay in correct alignment for clean, efficient ignition and a stable flame. Precise positioning of this arm is critical to combustion performance, fuel economy, and safe operation of your Lennox oil furnace.

When the 11C02 arm becomes damaged, corroded, or misaligned, you may notice hard starting, delayed ignition, sooting, an unstable or noisy flame, unusual odors, or repeated lockouts on the primary control. These symptoms point to a fuel-delivery or electrode positioning fault that a correctly seated arm assembly resolves.

Choosing an OEM Lennox part matters because the 11C02 is engineered to the exact dimensions and tolerances of your equipment. Aftermarket substitutes can shift nozzle and electrode geometry, degrading combustion and voiding warranty coverage. Installing the factory component restores rated efficiency and dependable, safe heating for your Lennox system.