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OEM Carrier 30A Contactor 2-Pole 24V Coil for HA1AJX030000ABAA
Carrier

OEM Carrier 30A Contactor 2-Pole 24V Coil for HA1AJX030000ABAA

SKU: CARRIE-HA1AJX030000ABAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HA1AJX030000ABAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 2-Pole 24V for Model HA1AJX030000ABAA

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier HA1AJX030000ABAA split-system air conditioner. The contactor is a high-voltage relay that receives a 24V signal from your thermostat and closes to send 240V power to the compressor and condenser fan motor. When the contactor fails — through pitted contacts, a burned coil, or contacts welded shut — your system will either refuse to turn on at all, run continuously without responding to the thermostat, or trip the breaker repeatedly.

  • Specs: 2-pole configuration | 24V AC coil voltage | Compatible with standard 30A load circuits | Direct OEM replacement for part number HN51KB024
  • OEM vs Generic: This OEM contactor meets Carrier's exact contact gap, coil pull-in voltage, and arc-suppression standards. Generic contactors often use lower-grade contact materials that pit faster under high-cycle summer loads, leading to repeat failures within a single season.
  • Install difficulty: 3/5 — Always shut off power at the disconnect box AND the breaker panel before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, multimeter, and needle-nose pliers. Photograph all wiring connections before removing the old unit. Discharge any capacitors nearby before working in the panel.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before our daily cutoff ship the same business day from our warehouse.

Compatibility: Designed specifically for the Carrier HA1AJX030000ABAA air handler and associated condensing equipment. Verify coil voltage and pole configuration on your existing contactor's label before ordering. Not sure if this is your part? Our HVAC parts specialists confirm fitment before you buy — no guesswork.

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 HA1AJX030000ABAA?
Yes. This is the factory-specified OEM contactor for the Carrier HA1AJX030000ABAA. 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 HA1AJX030000ABAA?
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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