OEM Lennox Inshot Burner Assembly 12-Pack — 18L62
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The Lennox 18L62 (factory number 619796-12) is a genuine OEM inshot burner assembly supplied as a complete 12-burner set for compatible Lennox gas furnaces. Inshot burners inject the air-fuel mixture straight into the heat exchanger tubes, where controlled combustion transfers heat to the airstream — making them a core component of clean, efficient furnace operation.
Common failure symptoms: Corroded, cracked, or scale-clogged inshot burners can cause delayed ignition, flame rollout, uneven or yellow flames, sooting, whistling or roaring noises, and repeated ignition lockouts. Because burners fire in sequence, a single damaged unit can disrupt flame carryover across the entire bank and reduce overall heat output.
Why OEM matters: Inshot burner performance depends on exact port sizing, spacing, and alignment with the gas orifices and heat-exchanger cells. The factory Lennox 18L62 set matches these specifications precisely, ensuring reliable cross-lighting, correct flame profile, and rated combustion efficiency. Replacing the full 12-burner set with OEM components restores uniform performance and protects the heat exchanger from hot spots caused by mismatched aftermarket burners.
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