OEM Lennox Burner Cap — 25W89
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The genuine OEM Lennox 25W89 burner cap seats over the burner to shape and distribute the flame evenly across the combustion chamber of your Lennox gas furnace. Proper flame distribution is critical for complete combustion, balanced heat transfer to the heat exchanger, and reliable flame sensing.
Common failure symptoms: A warped, cracked, or corroded burner cap can cause an uneven or lifting flame, delayed or rough ignition, flame rollout, incomplete combustion with increased carbon monoxide risk, and repeated lockouts on the flame sensor. You may also hear popping noises or notice inconsistent heating between cycles.
Why OEM matters: Lennox designs the 25W89 burner cap to precise dimensions and heat-resistant materials matched to the burner assembly and heat-exchanger geometry. Aftermarket substitutes may not align the flame correctly, risking efficiency loss and nuisance safety faults. Installing the factory OEM part ensures correct combustion, protects your heat exchanger, and maintains Lennox performance and warranty standards.
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