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Lennox

OEM Lennox Stainless Steel Heat Exchanger — 19A72

SKU: LNX-19A72 Brand: Lennox
$399.95 $549.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 19A72 stainless steel heat exchanger assembly transfers combustion heat into your home's air stream while keeping flue gases fully contained. Its stainless steel construction resists corrosion from condensate and acidic combustion byproducts, making it ideal for high-efficiency Lennox furnaces where moisture resistance is essential to long service life.

Common failure symptoms: Signs of a compromised exchanger include visible cracks, pinholes, or rust streaks, a burner flame that flutters or changes when the blower engages, a lingering combustion odor, soot deposits, or an activated carbon monoxide detector. Any of these symptoms calls for immediate replacement.

Why OEM matters: The heat exchanger is a life-safety component that separates toxic gases from the air your family breathes. Only the genuine Lennox 19A72 delivers the certified stainless alloy, factory weld quality, and exact fit that guarantee safe, efficient operation and keep your warranty intact. Generic aftermarket parts can't match this specification. Choose OEM stainless for durability and safety you can trust.

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

Frequently Asked Questions

Does this Heat Exchanger fit my Lennox OEM Lennox Stainless Steel Heat Exchanger — 19A72?
Yes. This is the factory-specified OEM heat exchanger for the Lennox OEM Lennox Stainless Steel Heat Exchanger — 19A72. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the heat exchanger on my Lennox OEM Lennox Stainless Steel Heat Exchanger — 19A72?
Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.
What symptoms mean I need a new heat exchanger?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this heat exchanger compatible with Bryant or Payne too?
Many Lennox parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Lennox heat exchanger?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
HVAC Parts Specialist — Online