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OEM Carrier Contactor 2-Pole 24V Coil for HC1AJX024000AAAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for HC1AJX024000AAAA

SKU: CARRIE-HC1AJX024000AAAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HC1AJX024000AAAA — 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 HC1AJX024000AAAA

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier HC1AJX024000AAAA split-system air conditioner. The contactor is a high-voltage relay that receives a 24V signal from the thermostat control circuit and closes to send 240V line power to the compressor and condenser fan motor. When the contactor fails — due to pitted or burned contacts, a stuck plunger, or a failed coil — your system will either refuse to start, run continuously without shutting off, or trip the breaker repeatedly.

  • Specs: 2-pole configuration | 24V coil voltage | 240V line voltage | Factory-matched contact rating | OEM part number HN51KB024
  • OEM vs Generic: This OEM contactor is manufactured to Carrier's exact contact gap, coil pull-in voltage, and current rating specifications. Aftermarket units frequently use inferior contact alloys that pit quickly under load, shortening service life and causing intermittent failures.
  • Install difficulty: 2/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any wiring. Tools needed: flat-head and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed by 3 PM ship the same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier HC1AJX024000AAAA split-system air conditioner. Always verify coil voltage and pole configuration against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — no guesswork, no returns.

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 HC1AJX024000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier HC1AJX024000AAAA. 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 HC1AJX024000AAAA?
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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