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OEM Carrier Contactor 1-Pole 25A 24V for PH10JA01800GADAA
Carrier

OEM Carrier Contactor 1-Pole 25A 24V for PH10JA01800GADAA

SKU: CARRIE-PH10JA01800GADAA-CONTACTOR-HN51KB024 Brand: Carrier
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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 1-Pole 25 Amp Contactor 24V Coil (HN51KB024) for Model PH10JA01800GADAA

This is the factory OEM contactor for the Carrier PH10JA01800GADAA heat pump / condensing system. The contactor is a high-voltage relay that acts as the primary electrical switch for your outdoor unit. When the thermostat calls for cooling or heating, the control board sends a 24V signal to the contactor coil, which closes the high-voltage circuit and energizes the compressor and condenser fan motor. A failed contactor is one of the most common reasons an outdoor unit will not start — symptoms include the system humming without starting, the unit not responding to the thermostat at all, or contact points that have welded together and keep the unit running continuously even after the thermostat is satisfied.

  • Specs: 1-Pole | 25 Amp load rating | 24V coil voltage | OEM Part Number HN51KB024 | Direct factory-spec replacement
  • OEM vs Generic: OEM contactors from Carrier feature factory-specified contact materials and coil windings, ensuring precise pull-in voltage and long service life. Generic contactors may use inferior contact alloys that pit and weld prematurely under normal cycling loads.
  • Install difficulty: 2/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any terminals. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Replace like-for-like on all terminal positions.
  • Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Factory-specified OEM replacement contactor for Carrier model PH10JA01800GADAA. Verify pole count, amp rating, and coil voltage against your unit's wiring diagram and data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — reach out before you 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 PH10JA01800GADAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH10JA01800GADAA. 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 PH10JA01800GADAA?
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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