OEM Lennox 6-Burner Inshot Burner Assembly — 18L58
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The genuine OEM Lennox 18L58 inshot burner assembly (factory number 619796-06) is a complete 6-burner rack that delivers gas to the heat exchanger and provides the flame for combustion in compatible Lennox gas furnaces. Each inshot burner shapes and directs the flame precisely, allowing the ignitor and flame sensor to establish and prove ignition on every heat call. Using the correct factory assembly ensures proper flame geometry, safe combustion, and reliable furnace operation.
Common failure symptoms: When burners corrode, warp, or accumulate rust and scale, you may notice delayed ignition, flame rollout, a rumbling or popping sound, yellow or lazy flames, short cycling, or the furnace locking out on failed flame sense. Cracked or clogged burner ports can also cause soot and incomplete combustion.
Why OEM matters: Lennox engineers the 18L58 burner assembly to exact port dimensions, spacing, and gas-orifice alignment for its specific furnace models. Aftermarket substitutes can shift flame characteristics and compromise safe, efficient heating. Choosing the factory-specified part guarantees correct fit, rated BTU input, and dependable ignition for the life of your Lennox equipment.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days