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OEM Carrier Contactor 2-Pole 24V Coil for CA15NA02400GAAAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for CA15NA02400GAAAA

SKU: CARRIE-CA15NA02400GAAAA-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 CA15NA02400GAAAA

This is the OEM factory-specified contactor (part number HN51KC024) for the Carrier CA15NA02400GAAAA split-system air conditioner. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when the thermostat calls for cooling, the contactor closes and sends 240V power to the compressor and condenser fan motor. A failed contactor is one of the most common causes of an AC unit that runs continuously with no cooling, won't start at all, or makes a loud chattering or buzzing noise from the disconnect box.

  • Specs: 2-pole configuration | 24V AC coil | 30-amp rated contacts | 240V power circuit | Factory-matched OEM replacement for part number HN51KC024
  • OEM vs Generic: This OEM contactor is built to Carrier's exact coil pull-in voltage and contact gap tolerances. Aftermarket contactors frequently use lower-grade contact materials that pit and arc faster under load, leading to repeat failures within a single cooling season.
  • Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, non-contact voltage tester. Photograph all wiring connections before removing the old contactor. Swap wires one at a time to avoid miswiring.
  • Warranty: Backed by Carrier's 1-year OEM parts warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier CA15NA02400GAAAA split-system condenser. Verify your existing contactor's pole count, amp rating, and coil voltage against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before your order ships — no guesswork required.

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 CA15NA02400GAAAA?
Yes. This is the factory-specified OEM contactor for the Carrier CA15NA02400GAAAA. 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 CA15NA02400GAAAA?
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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