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OEM Carrier 40A Contactor 2-Pole 24V Coil for CH16NA02400GBAAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for CH16NA02400GBAAA

SKU: CARRIE-CH16NA02400GBAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit CH16NA02400GBAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model CH16NA02400GBAAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier CH16NA02400GBAAA split-system condenser. The contactor is a high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to send 240V power to the compressor and condenser fan motor. When the contactor fails — due to pitted or burned contacts, a stuck plunger, or a failed coil — the outdoor unit will not energize at all, or may run continuously without responding to thermostat commands.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40A contact rating | Factory-matched coil pull-in voltage for reliable engagement every cycle
  • OEM vs Generic: OEM Carrier contactors (HN51KC024) use silver-alloy contacts rated for thousands of switching cycles. Generic contactors often use lower-grade contact materials that pit and weld prematurely, leading to repeat failures within a single season.
  • Install difficulty: 2/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, non-contact voltage tester. Photograph all wiring connections before removal.
  • Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed and factory-specified for the Carrier CH16NA02400GBAAA 2-ton split-system condenser. Always confirm coil voltage, pole count, and amperage rating on your unit's data plate before ordering. Our parts specialists are available to verify fitment — contact us before you order if you have any questions.

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 $99
  • 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 Contactor fit my Carrier CH16NA02400GBAAA?
Yes. This is the factory-specified OEM contactor for the Carrier CH16NA02400GBAAA. 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 contactor on my Carrier CH16NA02400GBAAA?
Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Open condensing unit panel. Step 3: Photograph ALL wiring on the contactor. Step 4: Label each wire with tape. Step 5: Disconnect wires and remove old contactor. Step 6: Mount new contactor, reconnect wires matching your photo. Step 7: Restore power and test.
My AC clicks but the compressor won’t turn on. What’s wrong?
Clicking from the outdoor unit without the compressor starting = worn contactor. The contactor sends power to the compressor. When its contacts are pitted, it clicks but can’t make solid contact. Look for: visible pitting/burn marks on the contactor face, intermittent operation, or buzzing.
Is this contactor compatible with Bryant or Payne too?
Many Carrier 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 Carrier contactor?
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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