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OEM Carrier Contactor 1-Pole 25A 24V for PH12NA030000ABAA
Carrier

OEM Carrier Contactor 1-Pole 25A 24V for PH12NA030000ABAA

SKU: CARRIE-PH12NA030000ABAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH12NA030000ABAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 1-Pole Contactor 25A 24V Coil — HN51KB024 for Model PH12NA030000ABAA

This is the genuine OEM Carrier contactor (part# HN51KB024), the factory-specified replacement for the Carrier PH12NA030000ABAA heat pump system. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when the thermostat calls for cooling or heating, the contactor closes to allow line-voltage power to flow to the compressor and/or fan motor. When the contactor fails, the most common symptoms include the outdoor unit not starting at all, a continuous buzzing or chattering sound from the disconnect box, or burned/welded contacts that keep the unit running non-stop even when the thermostat is off.

  • Specs: 1-Pole | 24V AC 50/60Hz Coil | 25 FLA (Full Load Amps) | Definite Purpose design | Factory OEM part number HN51KB024
  • OEM vs Generic: This is a genuine Carrier OEM contactor with exact-fit terminals and factory-rated contact materials. Aftermarket units often use lower-grade silver alloy contacts that pit and weld faster under repeated switching cycles, shortening overall system life.
  • Install difficulty: 2/5 — Always disconnect and lock out all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before disconnecting terminals. Verify contact pull-in with a 24V test signal after installation.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PH12NA030000ABAA. Verify your unit's data plate lists a 1-pole, 24V coil contactor before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get it shipped today.

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 PH12NA030000ABAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA030000ABAA. 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 PH12NA030000ABAA?
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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