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OEM Carrier Contactor 24V Coil 2-Pole for PH12NA030000AAAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH12NA030000AAAA

SKU: CARRIE-PH12NA030000AAAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH12NA030000AAAA — 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 PH12NA030000AAAA

This is the factory OEM contactor (part number HN51KB024) for the Carrier PH12NA030000AAAA heat pump system. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat. When the thermostat calls for cooling or heating, the contactor closes its high-voltage contacts to energize the compressor and condenser fan motor. A failed contactor is one of the most common reasons an outdoor unit won't turn on — symptoms include a humming outdoor unit with no compressor start, pitted or burned contacts visible on inspection, or the unit failing to respond to a thermostat call at all.

  • Specs: 24V AC coil voltage | 2-pole design | Replaces OEM part number HN51KB024 | Factory-matched contact rating for Carrier PH12NA030000AAAA
  • OEM vs Generic: This OEM contactor is manufactured to Carrier's exact coil voltage and contact ampacity specifications. Generic contactors often use lower-grade contact materials that pit and weld faster under load cycling, leading to premature failure and potential compressor damage.
  • Install Difficulty: 3/5 — Always disconnect power at the disconnect box AND the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, insulated gloves. Photograph all wiring before removal. The high-voltage line side (L1/L2) and load side (T1/T2) must be reconnected correctly.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PH12NA030000AAAA heat pump systems. Always verify coil voltage and pole configuration on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you order — reach out before you buy.

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 PH12NA030000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA030000AAAA. 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 PH12NA030000AAAA?
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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