OEM Lennox Inshot Burner — 71L03
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The Lennox 71L03 is a genuine OEM inshot burner that delivers and ignites the gas-air mixture inside your Lennox furnace's heat exchanger. Precisely formed to direct the flame into the exchanger tube, it ensures clean, complete combustion and even heat transfer, working alongside the igniter, gas valve, and flame sensor during every heating cycle.
Common failure symptoms: yellow or lazy flames instead of crisp blue, delayed ignition or rollout, rust and scale buildup, clogged burner ports, soot, and short cycling on the flame sensor. Corrosion, dust, and years of combustion exposure gradually degrade burner performance.
Why OEM matters: A factory Lennox 71L03 inshot burner is machined to the exact port size, orifice alignment, and flame geometry your furnace requires for safe, efficient combustion. Aftermarket burners can alter flame characteristics and combustion quality, risking incomplete burn and safety faults. OEM ensures proper flame stability, efficiency, and warranty protection.
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