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OEM Carrier Contactor 2-Pole 24V Coil for HA1CJX030000ABAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for HA1CJX030000ABAA

SKU: CARRIE-HA1CJX030000ABAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HA1CJX030000ABAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor HN51KB024 for Model HA1CJX030000ABAA

This is the factory-specified OEM contactor (part number HN51KB024) for the Carrier HA1CJX030000ABAA split-system air conditioner. The contactor is a high-voltage relay that acts as the main power switch for your condensing unit — when the thermostat calls for cooling, a 24V signal from the control board energizes the contactor coil, closing the high-voltage contacts and sending power to the compressor and condenser fan motor. A failed contactor is one of the most common causes of an outdoor unit that simply won't turn on, hums without starting, or runs continuously without cycling off due to welded contacts.

  • Specs: 2-pole configuration | 24V AC coil voltage | Factory-rated amperage for Carrier HA1CJX030000ABAA | Direct OEM replacement per part number HN51KB024
  • OEM vs Generic: This OEM contactor is manufactured to Carrier's exact coil pull-in voltage, contact material, and amp rating specifications. Generic contactors frequently use lower-grade silver-alloy contacts that arc and pit more rapidly, leading to premature failure and potential compressor damage.
  • Install difficulty: 3/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all high-voltage wiring connections before disconnecting. Coil wires are low-voltage (24V) — keep them labeled separately.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed as the direct OEM replacement contactor for the Carrier HA1CJX030000ABAA condensing unit. Always verify the OEM part number HN51KB024 against your unit's data plate or existing contactor label before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — contact us with your model and serial number.

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 HA1CJX030000ABAA?
Yes. This is the factory-specified OEM contactor for the Carrier HA1CJX030000ABAA. 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 HA1CJX030000ABAA?
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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