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OEM Carrier Contactor 1-Pole 24V 30A for PH12NA042000AGAA
Carrier

OEM Carrier Contactor 1-Pole 24V 30A for PH12NA042000AGAA

SKU: CARRIE-PH12NA042000AGAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PH12NA042000AGAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 1-Pole Contactor 24V 30A (HN51KC024) for Model PH12NA042000AGAA

This is the factory OEM replacement contactor for the Carrier PH12NA042000AGAA heat pump / air conditioning system. The contactor is the high-voltage relay that responds to a 24V thermostat signal to connect line voltage to the compressor and condenser fan motor. When it fails, the most common symptoms are an outdoor unit that won't turn on, an audible chattering or humming from the control compartment, contacts that are visibly burned or pitted, or — in the case of welded contacts — a unit that runs continuously and cannot be shut off by the thermostat.

  • Specs: 1-Pole | 24 VAC coil voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM part number HN51KC024
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to meet exact factory specifications for the PH12NA042000AGAA. Generic contactors often use lower-grade contact materials that pit and weld faster under compressor inrush loads, shortening service life significantly.
  • Install difficulty: 2/5 — Shut off power at both the disconnect and breaker before opening the control compartment. Photograph all wiring before removing any terminals. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers. Verify 24V coil pull-in after installation before closing the panel.
  • Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PH12NA042000AGAA. Also cross-references to P282-0311 and replaces HN51CC024, HN51KB024 in applicable configurations. Always verify the part number on your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility 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 PH12NA042000AGAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA042000AGAA. 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 PH12NA042000AGAA?
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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