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OEM Carrier Contactor 24V Coil 2-Pole for HA1CJX030000AAAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for HA1CJX030000AAAA

SKU: CARRIE-HA1CJX030000AAAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HA1CJX030000AAAA — 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 HA1CJX030000AAAA

This is the OEM factory-specified contactor (part number HN51KB024) for the Carrier HA1CJX030000AAAA split-system air conditioner. The contactor is a high-voltage relay that receives a 24V signal from the thermostat and closes to send 240V power to the compressor and condenser fan motor. When the contactor fails — whether from pitted contacts, a burned coil, or a stuck plunger — the result is an AC unit that either refuses to turn on at all or runs continuously without responding to thermostat commands.

  • Specs: 2-pole design | 24V coil voltage | Factory-rated amperage for HA1CJX030000AAAA | OEM part number HN51KB024 | Direct factory replacement with no modifications required
  • OEM vs Generic: OEM contactors like HN51KB024 feature precision-machined contact tips and coil windings rated to exact factory tolerances. Generic contactors frequently use lower-grade contact alloys that pit and burn faster, reducing service life significantly in high-cycle applications.
  • Install difficulty: 2/5 — Shut off power at both the disconnect box and the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removal to ensure correct reinstallation of line and load terminals.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocking warehouse.

Compatibility: Designed and factory-matched for Carrier model HA1CJX030000AAAA. 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 — just reach out before you buy. 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 HA1CJX030000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier HA1CJX030000AAAA. 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 HA1CJX030000AAAA?
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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