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OEM Carrier Contactor 24V Coil 2-Pole for PH12NA024000ACAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH12NA024000ACAA

SKU: CARRIE-PH12NA024000ACAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH12NA024000ACAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 24V Coil 2-Pole for Model PH12NA024000ACAA

This OEM contactor is the factory-specified replacement part (HN51KB024) for the Carrier PH12NA024000ACAA heat pump system. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when your thermostat calls for cooling or heating, the contactor closes to send 240V power to the compressor and condenser fan motor. When it fails, the most common symptom is an AC or heat pump that simply won't turn on despite the thermostat calling for operation. You may also notice pitting or burning on the contact points upon inspection, or hear a buzzing/chattering from the contactor coil.

  • Specs: OEM Part # HN51KB024 | 2-Pole configuration | 24V control coil voltage | Factory-matched contact amperage rating for Carrier PH12NA024000ACAA
  • OEM vs Generic: This is a genuine OEM Carrier contactor manufactured to exact factory specifications. OEM contacts resist pitting and arcing far longer than generic alternatives, which often use lower-grade contact alloys that degrade quickly under compressor load cycling.
  • Install Difficulty: 3/5 — This repair involves live 240V high-voltage wiring. Always shut off power at the disconnect and breaker before beginning. Photograph all wiring before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and insulated work gloves. If uncomfortable with high-voltage work, consult a licensed HVAC technician.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM drop-in replacement for Carrier model PH12NA024000ACAA heat pump systems. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get 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 PH12NA024000ACAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA024000ACAA. 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 PH12NA024000ACAA?
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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