Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart

IMAGE COMING SOON

Lennox

OEM Lennox Gas Valve — Y8120

SKU: LNX-Y8120 Brand: Lennox
$169.95 $229.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox Y8120 gas valve regulates and controls the flow of fuel to the burners in compatible Lennox gas furnaces. Working in concert with the ignition control and safety circuit, it opens on a call for heat, delivers gas at the correct manifold pressure, and shuts off instantly when the sequence ends or a fault is detected — the heart of safe, reliable combustion.

Common failure symptoms: When a gas valve fails you may notice no ignition at all, a burner that lights weakly or unevenly, delayed ignition with a "whoomp," clicking with no gas flow, or a furnace that fails to maintain temperature. A valve stuck closed leaves you without heat, while erratic operation and gas odors demand immediate attention.

Why OEM matters: The Y8120 is calibrated to your furnace's exact pressure and voltage requirements and is engineered to integrate with Lennox safety controls. Universal valves may require adapters, deliver incorrect manifold pressure, or fail agency-listing requirements for your appliance. Installing the factory-specified valve restores precise fuel control, preserves safe operation, and keeps your Lennox system within its rated performance.

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 — Y8120?
Yes. This is the factory-specified OEM gas valve for the Lennox OEM Lennox Gas Valve — Y8120. 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 — Y8120?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online