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Lennox

OEM Lennox Rectorseal Novent Locking Refrigerant Cap R410 100Pk — 18L72

SKU: LNX-18L72 Brand: Lennox
$18.95 $24.95

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Texas CMBL #19328542014
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Govt POs Accepted

The Lennox 18L72 is a Rectorseal 86684 Novent locking refrigerant cap designed for R410A systems, sold in a convenient 100-pack for service technicians and contractors. These tamper-resistant caps secure Schrader valve ports on Lennox equipment, preventing unauthorized refrigerant access, contamination, and accidental refrigerant loss. If your system is experiencing unexplained refrigerant loss or you need to meet EPA compliance standards for service port protection, this OEM-approved cap pack is the correct replacement for Lennox residential and light commercial systems.

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 Capacitor fit my Lennox OEM Lennox Rectorseal Novent Locking Refrigerant Cap R410 100Pk — 18L72?
Yes. This is the factory-specified OEM capacitor for the Lennox OEM Lennox Rectorseal Novent Locking Refrigerant Cap R410 100Pk — 18L72. 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 capacitor on my Lennox OEM Lennox Rectorseal Novent Locking Refrigerant Cap R410 100Pk — 18L72?
Difficulty: Easy (20–30 min)
Step 1: Turn off power at breaker. Step 2: Open condensing unit panel. Step 3: Photograph the old capacitor wiring (Common/Herm/Fan). Step 4: Discharge old capacitor with insulated screwdriver. Step 5: Disconnect and remove old capacitor. Step 6: Mount new capacitor, reconnect wires to matching terminals. Step 7: Close panel, restore power, test. Tools: screwdriver, needle-nose pliers.
My AC hums but won’t start. What part do I need?
An AC that hums but won’t start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost to start the compressor. When it fails, you hear humming but the motor can’t overcome inertia. Other symptoms: fan spinning slowly, AC cycling on/off rapidly, or a visibly swollen capacitor. Fix: replace capacitor ($15–$80 DIY, 30 min).
Is this capacitor 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 capacitor?
OEM strongly recommended. OEM capacitors have ±6% MFD tolerance vs aftermarket ±10%. The looser tolerance causes motor winding stress, higher temps, and shorter compressor life. Price difference is only $10–$20 — OEM is the clear value choice.
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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