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OEM Payne 2-Pole Contactor 24V Coil 30A for PA3ZNB042000AB
Payne

OEM Payne 2-Pole Contactor 24V Coil 30A for PA3ZNB042000AB

SKU: PAYNE-PA3ZNB042000AB-CONTACTOR-HN51KC024 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 24V Coil for Model PA3ZNB042000AB

This OEM replacement contactor (part number HN51KC024) is the factory-specified high-voltage relay for the Payne PA3ZNB042000AB split-system air conditioner. The contactor acts as the main power switch between your electrical panel and the compressor and condenser fan motor — when the thermostat calls for cooling, the 24V control circuit energizes the contactor coil, closing the high-voltage contacts and allowing the system to run. A failed contactor is one of the most common causes of an AC that simply won't turn on, buzzes continuously, or runs non-stop without cycling off due to welded contacts.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30A rated contacts | Direct OEM replacement, part number HN51KC024 | Compatible with R-410A systems
  • OEM vs Generic: This OEM contactor meets Carrier/Payne factory contact rating and coil pull-in specifications exactly. Generic contactors often use lower-grade contact alloys that pit and weld faster under the high inrush current of a compressor start, leading to premature failure and potential system damage.
  • Install difficulty: 3/5 — Requires disconnecting power at the disconnect box and verifying zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, multimeter. Photograph all wiring connections before removal. Always discharge any capacitors in the unit before working nearby.
  • Warranty: 1-year OEM factory warranty. In-stock and ships the same business day from our warehouse.

Compatibility: Engineered specifically for the Payne PA3ZNB042000AB (3.5-ton) split-system condenser. Cross-references directly to OEM part number HN51KC024. Verify your existing contactor's pole count, amperage, and coil voltage against your unit's data plate before ordering. Our fitment team is available to confirm compatibility — don't hesitate to reach out before you buy. Order today and get same-day shipping on all in-stock parts.

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 PA3ZNB042000AB?
Yes. This is the factory-specified OEM contactor for the Payne PA3ZNB042000AB. 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 PA3ZNB042000AB?
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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