OEM Lennox Gas Burner Assembly — 58L66
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The genuine OEM Lennox 58L66 burner assembly is responsible for combining fuel gas and air and projecting a stable, uniform flame into the heat exchanger of your Lennox furnace. Manufactured to exact Lennox burner port and orifice specifications, it ensures reliable ignition, a clean blue flame, and the proper heat output rated for your unit. Correct burner geometry is essential for efficient combustion and even heat transfer across the exchanger.
Common failure symptoms: slow or failed ignition, rumbling or roaring combustion noise, yellow or lifting flames, carbon and soot buildup, flame-sensor dropouts, or the furnace repeatedly locking out. Rust, corrosion, or blocked burner ports are the usual reasons a burner must be replaced.
Why OEM matters: Lennox engineers ignition and flame sensing around this burner's precise dimensions and materials. A generic replacement can alter the flame shape, trip safeties, or risk flame rollout and heat-exchanger damage. The OEM 58L66 delivers exact fit and factory-rated performance, keeping your Lennox system safe, efficient, and warranty-compliant. Ships same day when ordered before 3PM CST.
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