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OEM Carrier 40A Contactor 2-Pole 24V Coil HN51KC024 — CH14NB02400GBAAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil HN51KC024 — CH14NB02400GBAAA

SKU: CARRIE-CH14NB02400GBAAA-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 CH14NB02400GBAAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier CH14NB02400GBAAA split-system air conditioner. The contactor is the 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, the most common symptoms include the outdoor unit not turning on at all, the unit running constantly without cycling off, or visible pitting and burning on the contact points during inspection.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40 amp rating | Direct OEM replacement for part number HN51KC024 | Factory-matched electrical tolerances
  • OEM vs Generic: OEM contactors use silver-alloy contact points rated to factory specifications, resisting the arc erosion that causes premature failure. Generic contactors often use lower-grade alloys that pit faster, leading to repeat failures and potential compressor damage.
  • Install difficulty: 2/5 — Always shut off power at the disconnect box and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Terminals are typically labeled L1, L2 (line) and T1, T2 (load).
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed specifically for the Carrier CH14NB02400GBAAA condenser unit. Verify the coil voltage (24V) and pole count on your existing contactor's label before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you buy — no guesswork required. In stock and ships 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 — CH14NB02400GBAAA?
Yes. This is the factory-specified OEM contactor for the Carrier OEM Carrier 40A Contactor 2-Pole 24V Coil HN51KC024 — CH14NB02400GBAAA. 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 — CH14NB02400GBAAA?
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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