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OEM Carrier Contactor 2-Pole 24V Coil for HA1BJX036000ADAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for HA1BJX036000ADAA

SKU: CARRIE-HA1BJX036000ADAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HA1BJX036000ADAA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Contactor 2-Pole 24V Coil for Model HA1BJX036000ADAA

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier HA1BJX036000ADAA split-system condenser. The contactor is the high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to send line voltage to the compressor and condenser fan motor. When a contactor fails — through pitted contacts, a burned coil, or a stuck plunger — the most common symptom is an air conditioner that simply won't turn on, even though the thermostat is calling for cooling. You may also hear a clicking or chattering sound from the outdoor unit with no compressor startup.

  • Specs: 2-pole configuration | 24V AC coil voltage | Rated for high-amperage compressor loads | Direct factory replacement for OEM part number HN51KB024
  • OEM vs Generic: This OEM contactor meets Carrier's exact contact material and coil voltage tolerances. Generic contactors frequently feature lower-grade contact tips that pit and burn more rapidly under compressor inrush current, leading to repeat failures and potential compressor damage.
  • Install difficulty: 3/5 — Always disconnect power at the disconnect box and verify with a non-contact voltage tester before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter. Photograph all high-voltage wire connections before removing the old contactor to ensure correct reinstallation.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Designed specifically for the Carrier HA1BJX036000ADAA 3-ton condenser unit. Always confirm the coil voltage and pole configuration on your existing contactor's data label before ordering to ensure a direct fit. Our fitment specialists are available to verify compatibility before you purchase — no guesswork required. Order today and get back to cool faster.

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 HA1BJX036000ADAA?
Yes. This is the factory-specified OEM contactor for the Carrier HA1BJX036000ADAA. 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 HA1BJX036000ADAA?
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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