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Lennox

OEM Lennox Heat Exchanger Assembly Repair Part — 10A45

SKU: LNX-10A45 Brand: Lennox
$39.95 $54.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 10A45 is a heat exchanger assembly repair part (factory reference 605996-67, superseding 612216-05) used to service the heat transfer section of compatible Lennox furnaces. Produced to Lennox factory tolerances, it fits precisely within the exchanger assembly to maintain proper airflow, combustion separation, and heating efficiency.

Common failure symptoms: As the exchanger section wears, you may notice reduced or uneven heat output, an unstable or discolored burner flame, soot buildup, expansion and rattling noises, or nuisance high-limit shutdowns. These symptoms indicate the heat-transfer area should be inspected and the correct repair part installed.

Why OEM matters: On a combustion-adjacent, heat-transfer component, exact dimensions and material grade directly affect safety and performance. The OEM 10A45 guarantees proper mating with adjacent parts, preserves furnace certifications, and avoids the fit and longevity issues typical of generic aftermarket replacements.

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 Repair Part — 10A45?
Yes. This is the factory-specified OEM heat exchanger for the Lennox OEM Lennox Heat Exchanger Assembly Repair Part — 10A45. 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 Repair Part — 10A45?
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
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