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The Lennox 69W90 (factory reference 602866-10, supersedes 609702-01) burner assembly mixes gas and air and delivers a controlled flame into the heat exchanger of your Lennox furnace. Reliable burner condition is critical for efficient, clean-burning heat and steady output throughout the heating season. This is a genuine OEM replacement assembly built to the original 110-series specifications.
As burners age or become fouled, you may experience hard or delayed ignition, rough or noisy startups, flame rollout, soot accumulation, uneven flames, or flame-sensor lockouts that cause intermittent no-heat calls. Yellow flames or popping at ignition are common warning signs that the burner assembly should be inspected or replaced.
Why OEM matters: The 69W90 is engineered for the exact burner spacing, orifice alignment, and combustion behavior of Lennox furnaces. Genuine OEM parts protect combustion efficiency, flame stability, and safety-control operation, ensuring correct fit and dependable long-term performance that aftermarket alternatives can't guarantee.