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OEM Carrier Contactor 1-Pole 25A 24V for PH12NA02400GADAA
Carrier

OEM Carrier Contactor 1-Pole 25A 24V for PH12NA02400GADAA

SKU: CARRIE-PH12NA02400GADAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH12NA02400GADAA — 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 for Model PH12NA02400GADAA (HN51KB024)

This OEM Carrier contactor is the factory-specified replacement part for the Carrier PH12NA02400GADAA heat pump / condensing unit. The contactor is a high-voltage relay controlled by the 24V thermostat circuit — when your thermostat calls for cooling or heating, the contactor closes its contacts to energize the compressor and/or condenser fan motor. A failed contactor is one of the most common causes of a system that won't turn on at all, runs continuously without shutting off, or produces a loud buzzing/chattering noise from the electrical cabinet. Replacing it restores full high-voltage switching control to the unit.

  • Specs: 1-Pole | 25A Full Load Amps (FLA) | 24V 50/60Hz Coil | Definite Purpose Contactor | OEM Part # HN51KB024
  • OEM vs Generic: Genuine OEM contactors feature precision-machined silver-alloy contact tips and factory-rated coil windings that meet exact Carrier specifications. Generic aftermarket units often use subgrade contact materials prone to pitting, welding, and premature coil burnout — costing far more in callbacks than the price difference.
  • Install Difficulty: 2/5 — Shut off all power at the disconnect AND breaker before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring terminals before disconnecting. Transfer line, load, and 24V coil leads one at a time to the new contactor to avoid miswiring.
  • Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct factory replacement for Carrier model PH12NA02400GADAA. Also cross-references Carrier/Bryant/Payne family units calling for a 1-pole, 24V, 25A definite purpose contactor. Always verify amperage and coil voltage on your unit's wiring diagram or data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you're unsure.

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 PH12NA02400GADAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH12NA02400GADAA. 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 PH12NA02400GADAA?
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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