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OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH13NA03700GACBA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH13NA03700GACBA

SKU: CARRIE-CH13NA03700GACBA-CONTACTOR-HN51KC024 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil HN51KC024 for Model CH13NA03700GACBA

This OEM contactor (part number HN51KC024) is the factory-specified replacement for the Carrier CH13NA03700GACBA 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 240V power to the compressor and condenser fan motor. When it fails, the most common symptoms are an AC unit that won't turn on, a system that runs continuously without cycling off, or visible pitting and burning on the contact points inside the unit.

  • Specs: 2-pole configuration | 24V coil voltage | Factory-rated amperage for Carrier CH13NA03700GACBA | Direct OEM replacement, part number HN51KC024
  • OEM vs Generic: This is a genuine OEM Carrier contactor manufactured to exact factory specifications. Generic contactors may use lower-grade contact materials that arc and pit faster under load, leading to premature failure and potential compressor damage.
  • Install Difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning work. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter to verify coil voltage. Photograph all wiring connections before disconnecting the old contactor.
  • Warranty: Backed by a 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before 3 PM EST.

Compatibility: Designed specifically for the Carrier CH13NA03700GACBA split-system condenser. Verify pole count, coil voltage, and amperage rating on your unit's data plate before ordering to ensure proper fitment. Not sure if this is the right part? Our HVAC parts specialists verify fitment before every order — contact us before you buy.

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 OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH13NA03700GACBA?
Yes. This is the factory-specified OEM contactor for the Carrier OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH13NA03700GACBA. 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 OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH13NA03700GACBA?
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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