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Lennox

OEM Lennox ZP51K5E Scroll Compressor R-410A — 99M90

SKU: LNX-99M90 Brand: Lennox
$389.95 $529.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

Genuine OEM Lennox 99M90 Copeland ZP51K5E-PFV-830 scroll compressor. Rated at 51,000 BTUH on 208/230V, single-phase power for R-410A refrigerant, this compressor is the heart of your Lennox cooling system — compressing and moving refrigerant to carry heat from your home to the outdoor unit. Its ZP-series scroll design is engineered for the high pressures of R-410A, delivering efficient, quiet, and reliable operation across a large 4-plus-ton capacity range.

Common failure symptoms: Signs of compressor trouble include a system that runs without cooling, warm supply air, loud humming, clicking, or grinding on startup, tripped breakers or overload protectors, and a hard-locked unit that won't turn over. Loss of compression and burned windings signal the unit has reached end of life.

Why OEM matters: The 99M90 is matched precisely to your Lennox system's 208/230V single-phase supply and R-410A charge. The correct OEM compressor preserves rated capacity and efficiency, protects your equipment warranty, and avoids the electrical and pressure mismatches that lead to premature aftermarket failures. Replacement must be performed by a licensed HVAC technician with proper evacuation and charging procedures.

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 Compressor fit my Lennox OEM Lennox ZP51K5E Scroll Compressor R-410A — 99M90?
Yes. This is the factory-specified OEM compressor for the Lennox OEM Lennox ZP51K5E Scroll Compressor R-410A — 99M90. 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 ZP51K5E Scroll Compressor R-410A — 99M90?
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.
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Mike Rivera
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