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OEM Carrier 40A Contactor 2-Pole 24V Coil HN51KC024 — CA16NW02400GBAAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil HN51KC024 — CA16NW02400GBAAA

SKU: CARRIE-CA16NW02400GBAAA-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 CA16NW02400GBAAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier CA16NW02400GBAAA split-system air conditioner. The contactor is the high-voltage relay that receives a 24V signal from the thermostat and closes the circuit to energize the compressor and condenser fan motor. When it fails, your system may hum at the outdoor unit but never fully start, fail to respond to a cooling call entirely, or in some cases remain stuck closed — running continuously even when no cooling is demanded.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30-40 amp load rating | Factory-matched contact material and coil pull-in voltage for Carrier CA16NW02400GBAAA
  • OEM vs Generic: This OEM contactor uses factory-specified contact alloy and coil windings, ensuring consistent pull-in voltage and arc suppression. Generic contactors frequently use inferior contact materials that pit and weld prematurely, leading to repeat failures within a single season.
  • Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flat-head and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all high-voltage wiring before disconnecting. Transfer one wire at a time to avoid miswiring.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed and factory-specified for the Carrier CA16NW02400GBAAA split-system air conditioner. Verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you buy 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 $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 40A Contactor 2-Pole 24V Coil HN51KC024 — CA16NW02400GBAAA?
Yes. This is the factory-specified OEM contactor for the Carrier OEM Carrier 40A Contactor 2-Pole 24V Coil HN51KC024 — CA16NW02400GBAAA. 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 40A Contactor 2-Pole 24V Coil HN51KC024 — CA16NW02400GBAAA?
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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