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OEM Carrier Contactor 2-Pole 24V Coil for HA1BJX030000ACAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for HA1BJX030000ACAA

SKU: CARRIE-HA1BJX030000ACAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HA1BJX030000ACAA — 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 HA1BJX030000ACAA

This is the genuine OEM replacement contactor (part number HN51KB024) for the Carrier HA1BJX030000ACAA heat pump or split-system unit. The contactor is a high-voltage relay that acts as the main power switch between your electrical panel and the compressor and condenser fan motor. When the thermostat calls for cooling or heating, the 24V control circuit energizes the contactor coil, closing the high-voltage contacts and powering the outdoor unit. A failed or pitted contactor is one of the most common causes of an outdoor unit that simply won't start — often accompanied by a buzzing or chattering noise — even though the thermostat is calling for operation.

  • Specs: 2-pole configuration | 24V AC coil voltage | Rated for residential single-phase compressor loads | Factory-matched contact material and coil resistance to OEM specification (part HN51KB024)
  • OEM vs Generic: OEM contactors use factory-grade silver-alloy contact tips rated to exact amperage thresholds. Generic contactors frequently use lower-grade contacts that pit and arc faster under compressor inrush current, leading to repeat failures within one to two seasons.
  • Install Difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter to verify zero voltage before touching terminals. Photograph all wiring connections before removing the old contactor.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before the daily cut-off ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier HA1BJX030000ACAA. Always verify coil voltage, pole count, and amperage rating against your unit's data plate and existing contactor before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping means you're back up and running fast.

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 HA1BJX030000ACAA?
Yes. This is the factory-specified OEM contactor for the Carrier HA1BJX030000ACAA. 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 HA1BJX030000ACAA?
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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