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Lennox

OEM Lennox Gas Valve Replacement Kit (LB-95703A) — 45L91

SKU: LNX-45L91 Brand: Lennox
$169.95 $229.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The Lennox 45L91 is a genuine OEM gas valve replacement kit (superseding LB-95703A) engineered for Lennox gas furnaces. The gas valve is the heart of your furnace's combustion system — it regulates the precise flow of natural or LP gas to the burners and opens only on a valid call for heat from the control board, making it a critical safety component. This factory kit includes the correct valve and hardware to restore proper, code-compliant operation.

Common symptoms of a failing gas valve include a furnace that ignites intermittently or not at all, burners that fail to stay lit, weak or fluctuating flame, unusual clicking without ignition, or a system that locks out on repeated ignition failures. Because a stuck or leaking valve is a safety hazard, replacement should not be delayed.

Choosing an OEM Lennox 45L91 ensures exact fitment, correct gas pressure regulation, and full compatibility with your furnace's ignition sequence and safety controls. Aftermarket substitutes can introduce pressure and calibration mismatches that risk nuisance lockouts or unsafe combustion. This authentic Lennox part protects your equipment warranty and delivers the reliable heating performance your system was designed for.

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 Gas Valve fit my Lennox OEM Lennox Gas Valve Replacement Kit (LB-95703A) — 45L91?
Yes. This is the factory-specified OEM gas valve for the Lennox OEM Lennox Gas Valve Replacement Kit (LB-95703A) — 45L91. 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 gas valve on my Lennox OEM Lennox Gas Valve Replacement Kit (LB-95703A) — 45L91?
Requires licensed HVAC technician. Gas valve work involves gas lines that must meet local building codes. Improper installation risks dangerous gas leaks. Buy the part yourself to save 40–60% on markup, then have your technician install it.
What symptoms mean I need a new gas valve?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this gas valve 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 gas valve?
Always use OEM. Gas valves must match exact pressure ratings, port configurations, and safety certifications. Non-OEM gas valves can create safety hazards and may violate building codes.
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