OEM Lennox Inshot Burner Assembly (14) — 18L63
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The genuine OEM Lennox 18L63 (619796-14) inshot burner assembly is a complete 14-burner set that delivers and shapes the gas flame into the heat exchanger of your Lennox furnace. Inshot burners mix gas and air, provide a stable ignition point, and distribute even, efficient combustion across each heat exchanger tube. This assembly is factory-matched to Lennox firing rates and manifold pressures.
Symptoms of worn or fouled burners include delayed or rough ignition, yellow or lifting flames, sooting, flame rollout, or short-cycling on the flame sensor. Rust, cracked burner ports, or debris buildup all degrade combustion and can trigger safety lockouts.
Using the OEM Lennox 18L63 is essential because burner geometry, port sizing, and spacing are engineered for your furnace's specific gas valve and heat exchanger. Aftermarket burners can alter the air-fuel mixture, causing incomplete combustion, carbon monoxide risk, and premature component failure. This factory assembly guarantees correct flame characteristics, rated efficiency, and safe operation for 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