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OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH14NB03700GAAAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH14NB03700GAAAA

SKU: CARRIE-CH14NB03700GAAAA-CONTACTOR-HN51KC024 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor HN51KC024 for Model CH14NB03700GAAAA

This is the factory-specified OEM replacement contactor (part number HN51KC024) for the Carrier CH14NB03700GAAAA split-system air conditioner. The contactor is a high-voltage relay controlled by your thermostat's 24V signal — when the thermostat calls for cooling, the contactor closes and sends line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an AC unit won't start, hums without running, or runs continuously without shutting off. Pitted or burned contact points are the usual culprit and are often visible during inspection.

  • Specs: 2-pole configuration | 24V AC coil voltage | Heavy-duty contact rating | Direct OEM replacement for part number HN51KC024 — matches factory amperage and coil resistance exactly
  • OEM vs Generic: OEM contactors use factory-grade silver-alloy contact points with tighter coil tolerances. Generic substitutes often feature lower-grade contacts that pit faster under load, leading to premature failure and compressor damage.
  • Install difficulty: 2/5 — Always shut off power at the disconnect box and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before disconnecting terminals — high-voltage line and load wires must be reconnected correctly.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier CH14NB03700GAAAA condenser. 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 — contact us anytime. Order today and this part ships same business day.

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 — CH14NB03700GAAAA?
Yes. This is the factory-specified OEM contactor for the Carrier OEM Carrier Contactor 2-Pole 24V Coil HN51KC024 — CH14NB03700GAAAA. 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 — CH14NB03700GAAAA?
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
HVAC Parts Specialist — Online