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Lennox

OEM Lennox Heat Exchanger Assembly — R37670D001

SKU: LNX-R37670D001 Brand: Lennox
$399.95 $549.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox R37670D001 heat exchanger assembly, cross-referenced with R37214D001, is the central combustion heat-transfer component of your Lennox gas furnace. It transfers burner heat into the circulating air while sealing flue gases away from the air you breathe. Produced to Lennox factory specifications, this assembly guarantees the correct tube geometry, metal composition, and mounting fit for compatible furnace platforms.

Thermal cycling stresses heat exchangers over their service life. Symptoms of a failing R37670D001 include visible cracks or corrosion, an unstable or discolored burner flame, soot deposits, strange odors, frequent high-limit shutdowns, or carbon monoxide detected during a heat call. A cracked exchanger is a safety hazard and should be replaced immediately.

The OEM Lennox R37670D001 matters because generic replacements seldom match the original gauge, stamping, and tolerances, which can lead to premature cracking, poor heat transfer, and airflow problems. This factory-specified part restores rated performance and preserves your Lennox warranty coverage.

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 — R37670D001?
Yes. This is the factory-specified OEM heat exchanger for the Lennox OEM Lennox Heat Exchanger Assembly — R37670D001. 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 — R37670D001?
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