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Lennox

OEM Lennox Heat Exchanger Assembly — R37214D001

SKU: LNX-R37214D001 Brand: Lennox
$399.95 $549.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox R37214D001 heat exchanger assembly is the heart of your Lennox furnace's heating system, transferring combustion heat into the circulating air while safely isolating exhaust gases from the air your home breathes. Built to Lennox factory specifications, it ensures correct burner-to-exchanger alignment, proper draft, and the heat transfer efficiency your furnace was rated to deliver.

Common failure symptoms: Visible cracking, rust, or scaling on the exchanger, a burner flame that dances or rolls out, soot buildup, unusual smells when heating, or a carbon monoxide alarm sounding during furnace operation. A cracked or corroded heat exchanger poses a real safety risk and warrants prompt replacement.

Why OEM matters: Only the genuine R37214D001 matches the exact alloy, weld construction, and combustion geometry Lennox engineered for safe, efficient operation. Aftermarket substitutes can misalign the burners, degrade efficiency, and jeopardize combustion safety. Choosing the OEM assembly safeguards your warranty and your household. In stock and ready to ship same day.

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 Heat Exchanger Assembly — R37214D001?
Yes. This is the factory-specified OEM heat exchanger for the Lennox OEM Lennox Heat Exchanger Assembly — R37214D001. 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 Heat Exchanger Assembly — R37214D001?
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