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OEM Payne Contactor 2-Pole 24V Coil for PA10JA018000ACAA
Payne

OEM Payne Contactor 2-Pole 24V Coil for PA10JA018000ACAA

SKU: PAYNE-PA10JA018000ACAA-CONTACTOR-HN51KB024 Brand: Payne

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Payne 2-Pole Contactor (HN51KB024) for Model PA10JA018000ACAA

This OEM replacement contactor (part number HN51KB024) is the factory-specified high-voltage relay for the Payne PA10JA018000ACAA air conditioning system. The contactor acts as the primary electrical switch that allows the thermostat's low-voltage 24V signal to energize the high-voltage circuit powering the compressor and condenser fan motor. When the contactor fails, you may notice the outdoor unit failing to start entirely, the system running continuously without shutting off, or visible pitting and burning on the contact points — all signs that replacement is immediately needed to prevent compressor damage.

  • Specs: 2-pole configuration | 24V coil voltage | Factory-rated amperage for PA10JA018000ACAA | OEM part number HN51KB024 | Contacts rated for high-cycle residential duty
  • OEM vs Generic: This is a genuine OEM contactor built to Payne's exact coil pull-in voltage and contact gap specifications. Generic contactors often use lower-grade silver-alloy contacts that pit and weld faster, leading to premature failure and potential compressor lock-out.
  • Install Difficulty: 3/5 — Requires shutting off power at the disconnect box AND the breaker panel before beginning work. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and electrical tape. Always photograph all wire connections before removing the old contactor. Verify power is off with a non-contact voltage tester before touching any terminals.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered as a direct OEM replacement for the Payne PA10JA018000ACAA split-system air conditioner. Cross-reference your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before your order ships — contact us for a free confirmation.

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 $75
  • 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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Contactor fit my Payne PA10JA018000ACAA?
Yes. This is the factory-specified OEM contactor for the Payne PA10JA018000ACAA. 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 Payne PA10JA018000ACAA?
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 Payne 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 Payne 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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