What are the specs for this Valve?

The correct replacement for Lennox model OEM Lennox 100679-01 Valve-Expansion — 25W22 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Lennox equipment which lists the model number OEM Lennox 100679-01 Valve-Expansion — 25W22.

What symptoms indicate I need a new valve?

Common symptoms that indicate you need a new valve include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

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Lennox

OEM Lennox 100679-01 Valve-Expansion — 25W22

Name: OEM Lennox 100679-01 Valve-Expansion — 25W22
Brand: Lennox
SKU: LNX-25W22
Price: 59.95 USD
Availability: InStock

SKU: LNX-25W22 Brand: Lennox

$59.95 $84.95

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The Lennox 25W22 (OEM part 100679-01) is a factory-original expansion valve built to Lennox engineering standards, designed to accurately meter refrigerant into the evaporator coil for consistent and efficient system operation. As a direct OEM replacement, this valve ensures compatibility and performance that aftermarket alternatives cannot guarantee. Signs of expansion valve failure in your Lennox system may include warm air discharge, excessive frost on coil surfaces, or compressor short cycling — replace with this genuine Lennox part to return your system to factory specifications.

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

OEM Lennox 100679-01 Valve-Expan...

$59.95

Frequently Asked Questions

Does this Valve fit my Lennox OEM Lennox 100679-01 Valve-Expansion — 25W22?

Yes. This is the factory-specified OEM valve for the Lennox OEM Lennox 100679-01 Valve-Expansion — 25W22. 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 valve on my Lennox OEM Lennox 100679-01 Valve-Expansion — 25W22?

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 valve?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this 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 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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OEM Lennox 100679-01 Valve-Expansion — 25W22

Shipping Information

Return Policy

Frequently Asked Questions