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OEM Carrier Contactor 24V 2-Pole 30A for PH12NA018000ABAA
Carrier

OEM Carrier Contactor 24V 2-Pole 30A for PH12NA018000ABAA

SKU: CARRIE-PH12NA018000ABAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH12NA018000ABAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model PH12NA018000ABAA

This is the factory OEM replacement contactor for Carrier model PH12NA018000ABAA heat pump and air conditioning systems. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat. When the call for cooling or heating arrives, the contactor closes its contacts to energize 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 — even when the thermostat is calling. Pitted or burned contact points, a humming coil that won't pull in, or a contactor stuck in the closed position (causing the unit to run non-stop) are all telltale signs of failure.

  • Specs: 2-Pole | 24V coil voltage | 30A contact rating | Replacement for OEM part number HN51KB024 | Factory-matched contact material and coil pull-in voltage
  • OEM vs Generic: This OEM contactor meets Carrier's exact coil pull-in voltage and contact surface specifications. Generic aftermarket contactors often use inferior contact alloys that pit and corrode faster under the high-amperage loads of residential compressors, shortening the service life of the repair.
  • Install difficulty: 2/5 — Always disconnect power at the breaker and verify zero voltage with a multimeter before touching any terminals. Photograph all wiring before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. The contactor typically mounts with two screws and wires terminate on labeled screw lugs.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for Carrier PH12NA018000ABAA. Always cross-reference the OEM part number HN51KB024 and verify coil voltage and pole count on your unit's data plate or wiring diagram before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime.

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 PH12NA018000ABAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA018000ABAA. 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 PH12NA018000ABAA?
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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