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Lennox

OEM Lennox Gas Valve 3/4" NG LF25 Series — 16Y31

SKU: LNX-16Y31 Brand: Lennox
$169.95 $229.95

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Texas CMBL #19328542014
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Govt POs Accepted

The genuine OEM Lennox 16Y31 is a 3/4" x 3/4" natural gas valve engineered for LF25 series furnaces. This valve regulates the flow of natural gas to the burner assembly, opening and closing on command from the furnace control board to deliver safe, precise ignition and consistent heat output. Because it manages both gas volume and pressure, it is one of the most critical safety components in your Lennox heating system.

Common failure symptoms: A failing gas valve often shows up as a furnace that ignites intermittently, fails to light entirely, produces weak or fluctuating flames, or shuts down on a safety lockout. You may also hear clicking without ignition or notice inconsistent heating throughout your home. A stuck or leaking valve should be replaced immediately for safe operation.

Why OEM matters: The 16Y31 is calibrated to the exact gas pressure and electrical specifications your Lennox LF25 furnace expects. Universal or aftermarket valves can deliver incorrect gas flow, void warranties, and create serious safety hazards. Installing the factory-matched OEM part ensures proper fit, reliable ignition, and full compliance with your equipment's 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 3/4" NG LF25 Series — 16Y31?
Yes. This is the factory-specified OEM gas valve for the Lennox OEM Lennox Gas Valve 3/4" NG LF25 Series — 16Y31. 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 3/4" NG LF25 Series — 16Y31?
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