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OEM Carrier 40A Contactor 2-Pole 24V Coil for CH13NA03700GACAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for CH13NA03700GACAA

SKU: CARRIE-CH13NA03700GACAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit CH13NA03700GACAA — 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 CH13NA03700GACAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier CH13NA03700GACAA split-system air conditioner. 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 contacts, a stuck plunger, or a burned coil — your outdoor unit will not energize at all, or may run continuously without cycling off. This OEM part restores factory-specified switching performance and protects your compressor from irregular voltage delivery.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40A load rating | Heavy-duty silver-alloy contact tips | Direct OEM replacement for part number HN51KC024
  • OEM vs Generic: This factory-matched contactor meets Carrier's exact coil impedance and contact gap specifications. Generic contactors often use lower-grade contact alloys that arc and pit faster, leading to repeat failures within a single cooling season.
  • Install Difficulty: 2/5 — Shut off power at both the thermostat and the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all high-voltage wiring connections before removing the old contactor. Swap wires one at a time to avoid miswiring.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before the daily cutoff ship the same business day from our warehouse.

Compatibility: Engineered as a direct OEM drop-in replacement for the Carrier CH13NA03700GACAA 3-ton split-system condenser. Always verify coil voltage and pole configuration on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — reach out via chat or phone and have your model and serial number ready.

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 CH13NA03700GACAA?
Yes. This is the factory-specified OEM contactor for the Carrier CH13NA03700GACAA. 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 CH13NA03700GACAA?
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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