What are the specs for this Compressor?

The correct replacement for Lennox model OEM Lennox Scroll Compressor 125,000 BTUH R-407C — 11B43 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 Scroll Compressor 125,000 BTUH R-407C — 11B43.

What symptoms indicate I need a new compressor?

Common symptoms that indicate you need a new compressor 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 Scroll Compressor 125,000 BTUH R-407C — 11B43

Name: OEM Lennox Scroll Compressor 125,000 BTUH R-407C — 11B43
Brand: Lennox
SKU: LNX-11B43
Price: 389.95 USD
Availability: InStock

SKU: LNX-11B43 Brand: Lennox

$389.95 $529.95

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The Lennox 11B43 is a genuine OEM ZR125KCE-TFE-950 scroll compressor rated at 125,000 BTUH, engineered for R-407C refrigerant on 575V 3-phase power. This high-capacity scroll compressor is the core of your Lennox condensing unit, compressing and circulating refrigerant to reject heat and deliver cooling. Its scroll design provides smooth, efficient, and durable operation, and it serves as a direct factory-matched replacement for compatible Lennox systems.

Common Failure Symptoms

No cooling or noticeably reduced capacity
Compressor hums but fails to start, or trips the breaker
Loud grinding, rattling, or knocking noises
Frequent short-cycling or overheating shutdowns
Tripped internal overload protection

Why OEM Matters

The genuine Lennox 11B43 matches the exact displacement, 575V electrical rating, and R-407C refrigerant compatibility your equipment was designed around. Mismatched or aftermarket compressors risk capacity loss, premature failure, and voided warranties. Choose OEM to protect efficiency, ensure a proper bolt-in fit, and maintain rated performance for your Lennox equipment.

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 Scroll Compressor 125...

$389.95

Frequently Asked Questions

Does this Compressor fit my Lennox OEM Lennox Scroll Compressor 125,000 BTUH R-407C — 11B43?

Yes. This is the factory-specified OEM compressor for the Lennox OEM Lennox Scroll Compressor 125,000 BTUH R-407C — 11B43. 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 compressor on my Lennox OEM Lennox Scroll Compressor 125,000 BTUH R-407C — 11B43?

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 compressor?

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

Is this compressor 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 compressor?

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.