OEM Lennox Burner — 46K18
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The genuine OEM Lennox 46K18 burner mixes gas and air and delivers a stable, evenly distributed flame into the heat exchanger of your Lennox gas furnace. Proper burner condition is essential for clean, efficient combustion, correct flame carryover across the burner bank, and safe heat transfer. This burner is manufactured to the precise dimensions and port geometry Lennox specifies for reliable ignition.
Symptoms of a worn, corroded, or clogged 46K18 burner include delayed or rough ignition, a yellow or lazy flame instead of crisp blue, flame rollout, sooting, or nuisance flame-sensor lockouts. Rust, scale buildup, and blocked ports from years of cycling are common causes and can compromise both efficiency and safety.
Choosing the OEM Lennox 46K18 ensures the correct port sizing, orifice alignment, and flame-crossover design your furnace was engineered around. Mismatched burners can produce uneven ignition, incomplete combustion, or dangerous rollout conditions. The factory-specified 46K18 restores a clean, properly shaped flame and safe, efficient heating in your Lennox system.
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