OEM Lennox Burner Kit LB-91395A — 84K51
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The genuine OEM Lennox 84K51 burner kit (also referenced as LB-91395A) provides the factory-specified burner components for your Lennox gas furnace. The burners combine gas and air to produce and sustain a stable, evenly distributed flame across the heat exchanger, which is essential for safe, efficient, and consistent heating.
Common failure symptoms: Corroded or worn burners frequently cause delayed or failed ignition, yellow or uneven flames, rumbling and flame roll-out, sooting, short-cycling, and repeated flame-sensor lockouts. If the furnace is slow to light or the flame pattern looks off, the burner assembly is a common cause.
Why OEM matters: The 84K51 / LB-91395A kit is manufactured to Lennox's exact burner geometry, port sizing, and gas ratings so ignition, flame sensing, and heat-exchanger alignment operate as designed. Aftermarket burners can alter the air-fuel mixture and flame position, risking incomplete combustion and voided warranties. Installing the OEM kit restores original ignition reliability, flame quality, and rated furnace performance.
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