OEM Lennox Inshot Burner Assembly, LGA Series — 79J74
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The genuine OEM Lennox 79J74 is an inshot burner assembly designed for Lennox LGA series gas-fired units. Inshot burners fire the gas-air mixture directly into the heat exchanger tubes, providing the efficient, high-velocity flame these commercial and rooftop units rely on for consistent heating performance.
Common failure symptoms: Worn inshot burners commonly cause delayed or rough ignition, flame that lifts or rolls out, yellow or sooty flames, rumbling and vibration, and nuisance safety lockouts. Corrosion or blocked burner ports disrupt the flame pattern and reduce combustion efficiency, driving up fuel use and callbacks.
Why OEM matters: The 79J74 is manufactured to the exact port and orifice geometry the LGA series requires, so the flame aligns properly with the ignition source, flame sensor, and heat exchanger inlet. Substitute burners can misfire, soot, or defeat safety controls. Installing the factory Lennox inshot burner ensures the correct flame profile, reliable ignition, and full compatibility with your LGA series equipment.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
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Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
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