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OEM Carrier Contactor 24V Coil 2-Pole for PH10JA018000ABAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH10JA018000ABAA

SKU: CARRIE-PH10JA018000ABAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH10JA018000ABAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 24V Coil 2-Pole for Model PH10JA018000ABAA

This OEM contactor (part number HN51KB024) is the factory-specified replacement for the Carrier PH10JA018000ABAA heat pump system. The contactor is a high-voltage electromagnetic relay that controls power delivery to the compressor and condenser fan motor. When the thermostat calls for cooling or heating, the 24V control circuit energizes the contactor coil, closing the high-voltage contacts and allowing the system to run. A failed contactor commonly causes the outdoor unit to remain completely unresponsive, hum without starting, or exhibit pitted and burned contacts that cause intermittent operation or hard starts.

  • Specs: OEM Part Number HN51KB024 | 2-Pole configuration | 24V coil voltage | Factory-rated amperage for Carrier PH10JA018000ABAA heat pump — exact OEM replacement with no modifications required
  • OEM vs Generic: This is a genuine OEM Carrier contactor manufactured to exact factory specifications. Generic contactors may use lower-grade contact materials that pit and weld faster under load, shortening service life and risking compressor damage. OEM ensures proper coil pull-in voltage and contact rating.
  • Install Difficulty: 3/5 — Work involves 240V high-voltage wiring. Shut off power at both the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and wire labels or tape. Photograph all wiring before removal. Recommend licensed HVAC technician for first-time installers.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed as a direct OEM drop-in replacement for Carrier model PH10JA018000ABAA. Always verify your existing contactor's coil voltage, pole count, and amperage rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions.

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 PH10JA018000ABAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH10JA018000ABAA. 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 PH10JA018000ABAA?
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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