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OEM Carrier Contactor 24V Coil 2-Pole for HA1CJX024000AAAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for HA1CJX024000AAAA

SKU: CARRIE-HA1CJX024000AAAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HA1CJX024000AAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 2-Pole 24V Coil for Model HA1CJX024000AAAA

This is the OEM replacement contactor (part number HN51KB024) for the Carrier HA1CJX024000AAAA split-system air conditioner. The contactor is a 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 — whether from pitted contacts, a stuck plunger, or a burned coil — your outdoor unit will refuse to energize, leaving the air handler running but no cooling taking place. In some cases, a failed contactor causes the unit to run continuously without cycling off.

  • Specs: 2-pole configuration | 24V AC coil voltage | Factory-rated amperage for Carrier HA1CJX024000AAAA | OEM part number HN51KB024 — direct factory replacement, no modification required
  • OEM vs Generic: OEM contactors feature silver-alloy contacts rated to factory specifications, ensuring proper arc suppression and long service life. Generic contactors frequently use inferior contact materials that pit and weld faster under load, increasing the risk of a locked-on condition and compressor damage.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Transfer wires one at a time to avoid miswiring.
  • 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: This contactor is factory-specified for the Carrier HA1CJX024000AAAA split-system condenser. Always verify coil voltage and pole configuration against your unit's wiring diagram and data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — reach out via chat or phone.

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 HA1CJX024000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier HA1CJX024000AAAA. 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 HA1CJX024000AAAA?
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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