OEM Lennox In-Shot Burner — 27K33
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The genuine OEM Lennox 27K33 in-shot burner delivers a precisely shaped gas flame into the heat exchanger of your Lennox gas furnace. Each in-shot burner draws in primary air and directs the gas-air mixture for clean, complete combustion, transferring heat efficiently while keeping carbon monoxide production low. Consistent flame geometry is essential for reliable ignition and safe operation.
Common failure symptoms: delayed ignition or a rollout "whoomph" on start-up, yellow or lazy flames instead of crisp blue, rust, cracking, or corrosion on the burner, soot buildup, or flame-sensor faults causing lockouts. Rust flakes and spider webs clogging the burner venturi are typical reasons a burner needs replacement.
Why OEM matters: the Lennox 27K33 is manufactured to exact orifice alignment, port sizing, and mounting dimensions so the flame lands correctly in the heat exchanger. Generic burners can misalign the flame, cause hot spots, or fail to seat against the manifold — risking cracked heat exchangers and unsafe combustion. Installing the factory-spec burner guarantees proper fit, rated efficiency, and safe performance in your Lennox equipment.
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