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OEM Carrier 40A Contactor 2-Pole 24V Coil for CA17NA02400GBAAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for CA17NA02400GBAAA

SKU: CARRIE-CA17NA02400GBAAA-CONTACTOR-HN51KC024 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model CA17NA02400GBAAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier CA17NA02400GBAAA split-system air conditioner. The contactor is a high-voltage relay that receives a 24V signal from the thermostat and closes the circuit to send line voltage to the compressor and condenser fan motor. When a contactor fails — due to pitted contacts, a burned coil, or contacts welded shut — the system will either refuse to start entirely or run continuously without responding to thermostat commands.

  • Specs: 2-pole configuration | 24V coil voltage | 30–40 amp rating | Screw-terminal connections | Direct factory replacement for OEM part HN51KC024
  • OEM vs Generic: The OEM HN51KC024 contactor is manufactured to Carrier's exact coil pull-in voltage and contact-gap specifications. Generic contactors may use lower-grade silver-alloy contacts that pit faster under load, causing premature failure — especially in high-cycle climates.
  • Install difficulty: 2/5 — Always disconnect power at the breaker and verify zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removal.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship the same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier CA17NA02400GBAAA split-system condenser. Cross-reference OEM part number HN51KC024 against your unit's data plate and existing contactor label to confirm pole count, amperage, and coil voltage before ordering. Our parts specialists are available to verify fitment — contact us before you buy if you have any doubt.

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 Contactor fit my Carrier CA17NA02400GBAAA?
Yes. This is the factory-specified OEM contactor for the Carrier CA17NA02400GBAAA. 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 CA17NA02400GBAAA?
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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