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Carrier

OEM Carrier Contactor HN51KC024 for Model HA1BJX018000ADAA

SKU: carrier-contactor-ha1bjx018000adaa Brand: Carrier
$34.95

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Carrier Contactor HN51KC024 for Model HA1BJX018000ADAA

This OEM Carrier HN51KC024 definite purpose contactor is the electrically-controlled switch that energizes the compressor and condenser fan motor in your HA1BJX018000ADAA air conditioner. When the thermostat calls for cooling, the contactor's coil pulls in and closes the line-voltage contacts; worn, pitted, or chattering contacts are a leading cause of an outdoor unit that hums but won't start. Built to Carrier's exact factory specifications, this 24V-coil contactor drops directly into the HA1BJX018000ADAA control box for a true plug-and-play replacement — no rewiring or modification required. Most homeowners and technicians rate this an easy 20-30 minute repair: disconnect power, photograph the wiring, transfer leads one at a time, and mount. Using a genuine OEM contactor preserves the rated amperage, coil voltage, and UL listing your system was engineered around. In stock and ready to ship same-day on orders placed before 3PM CST, so you can get your cooling back fast. Restore reliable, quiet compressor engagement with the correct Carrier-spec part the first time.

Compatibility

This part is compatible with Carrier model HA1BJX018000ADAA.

Shipping

Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.

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 $75
  • 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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Contactor fit my Carrier Model HA1BJX018000ADAA?
Yes. This is the factory-specified OEM contactor for the Carrier Model HA1BJX018000ADAA. 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 Model HA1BJX018000ADAA?
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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