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OEM Carrier Contactor 1-Pole 30A 24V for PH12NA042000AAAA
Carrier

OEM Carrier Contactor 1-Pole 30A 24V for PH12NA042000AAAA

SKU: CARRIE-PH12NA042000AAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PH12NA042000AAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Single-Pole Contactor 1-Pole 30A 24V Coil for Model PH12NA042000AAAA (HN51KC024)

This is the genuine OEM factory-authorized replacement contactor for the Carrier PH12NA042000AAAA heat pump and split-system condenser. The contactor is the primary high-voltage switching relay in your outdoor unit — when the thermostat sends a 24V signal, the contactor closes to deliver line voltage to the compressor and condenser fan motor. A failing contactor causes some of the most common and frustrating HVAC symptoms: the unit won't turn on, runs continuously without shutting off, chatters or buzzes loudly from the electrical panel, or trips the breaker due to burned and pitted contacts welding together.

  • Specs: 1-Pole configuration | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 24 VAC coil voltage | 50/60 Hz | OEM Part# HN51KC024
  • OEM vs Generic: This is a Factory Authorized Part built to exact Carrier specifications, ensuring proper coil pull-in voltage, contact gap, and arc suppression. Generic aftermarket contactors often use thinner contact material that pits faster under high compressor inrush loads, shortening service life significantly.
  • Install difficulty: 2/5 — Shut off power at both the disconnect and the breaker before opening the control panel. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph existing wiring before disconnecting terminals. Verify 24V coil pull-in after installation with a call from the thermostat.
  • Warranty: 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Directly fits Carrier model PH12NA042000AAAA heat pump condensers. Cross-references include P282-0311, HN51CC024, and 3100-15Q228. Always confirm the part number on your unit's wiring diagram or data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility 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 PH12NA042000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA042000AAAA. 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 PH12NA042000AAAA?
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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