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OEM Carrier 40A Contactor 2-Pole 24V Coil for CH14NA01800GAAAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for CH14NA01800GAAAA

SKU: CARRIE-CH14NA01800GAAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit CH14NA01800GAAAA — 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 CH14NA01800GAAAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier CH14NA01800GAAAA split-system air conditioner. The contactor is a high-voltage relay that receives a 24V signal from the thermostat and switches line voltage to energize the compressor and condenser fan motor. When it fails — due to pitted contacts, a burned coil, or a stuck plunger — the outdoor unit will not respond at all, or it may run continuously even when cooling is not called for.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40 amp contact rating | Direct OEM replacement for part number HN51KC024 | Factory-matched contact gap and coil pull-in voltage
  • OEM vs Generic: OEM contactors use silver-alloy contacts rated to factory arc-interruption specs. Generic contactors frequently use lower-grade contact material that pits faster under the high-current switching loads of a compressor, shortening service life significantly.
  • Install difficulty: 3/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wire positions before removal. Line-voltage terminals are present — exercise caution throughout.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier CH14NA01800GAAAA condenser. Always verify coil voltage and pole count against your unit's wiring diagram and data plate before ordering. Our technical team is available to confirm fitment — contact us before you order if you have any questions. In stock and ready to ship today.

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 CH14NA01800GAAAA?
Yes. This is the factory-specified OEM contactor for the Carrier CH14NA01800GAAAA. 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 CH14NA01800GAAAA?
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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