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OEM Carrier Contactor 24V Coil 2-Pole for PH12NA02400GACAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH12NA02400GACAA

SKU: CARRIE-PH12NA02400GACAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH12NA02400GACAA — 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 PH12NA02400GACAA

This is the factory OEM replacement contactor for the Carrier PH12NA02400GACAA heat pump / condensing unit. The contactor is the high-voltage relay that receives a 24V signal from the thermostat and closes the circuit to power the compressor and condenser fan motor. When this component fails, the most common symptom is an air conditioning or heat pump system that simply will not turn on — despite the thermostat calling for cooling or heating. You may also notice visible pitting or burning on the contact points, or hear a clicking/chattering sound as the contactor struggles to hold its position.

  • Specs: 2-pole design | 24V AC coil voltage | Factory-rated amperage matched to OEM specification | Direct drop-in replacement for OEM part number HN51KB024
  • OEM vs Generic: This OEM contactor is manufactured to Carrier's exact contact material and spring tension tolerances. Generic contactors often use lower-grade silver-alloy contacts that pit and burn faster, leading to repeat failures and potential compressor damage from voltage drop.
  • Install difficulty: 3/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removal. The line-voltage (L1/L2) and load (T1/T2) terminals must be correctly re-terminated.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH12NA02400GACAA unit. Always verify coil voltage and pole count against your unit's data plate or wiring diagram before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.

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 PH12NA02400GACAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA02400GACAA. 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 PH12NA02400GACAA?
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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