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OEM Carrier Contactor 1-Pole 24V 25A for PH10JA01800GAFAA
Carrier

OEM Carrier Contactor 1-Pole 24V 25A for PH10JA01800GAFAA

SKU: CARRIE-PH10JA01800GAFAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH10JA01800GAFAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 1-Pole Contactor 24V 25A — HN51KB024 for Model PH10JA01800GAFAA

This OEM single-pole contactor is the factory-specified replacement for the Carrier PH10JA01800GAFAA condenser unit. The contactor acts as a high-voltage relay, using a low-voltage (24V) signal from the thermostat to close the high-voltage circuit that powers the compressor and condenser fan motor. When the contactor fails — whether from pitted contacts, a burned coil, or a stuck plunger — the system will not respond to a cooling call, leaving you with warm air despite a functioning thermostat and control board.

  • Specs: 1-Pole | 24V 50/60Hz Coil | 25A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | Definite Purpose design for HVAC condensing units
  • OEM vs Generic: This is a genuine Carrier OEM part (HN51KB024), manufactured to exact factory contact gap, coil pull-in voltage, and contact plating specs. Generic aftermarket contactors often use thinner silver-alloy contacts that pit and burn faster under repeated cycling, shortening equipment lifespan.
  • Install difficulty: 2/5 — Always shut off power at the disconnect box and verify zero voltage with a multimeter before servicing. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter to verify coil continuity. The contactor is located inside the condenser's electrical panel, typically secured by two screws.
  • Warranty: 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PH10JA01800GAFAA. Cross-references include successor part HN51KC024. Always verify pole count, coil voltage, and amperage rating on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime.

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 PH10JA01800GAFAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH10JA01800GAFAA. 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 PH10JA01800GAFAA?
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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