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OEM Payne Contactor 2-Pole 24V Coil for PA1ZNA042000AAAA
Payne

OEM Payne Contactor 2-Pole 24V Coil for PA1ZNA042000AAAA

SKU: PAYNE-PA1ZNA042000AAAA-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 24V Coil for Model PA1ZNA042000AAAA

This is the factory OEM replacement contactor (part number HN51KB024) for the Payne PA1ZNA042000AAAA split-system air conditioner. The contactor is a high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to supply line voltage to the compressor and condenser fan motor. When the contactor fails — due to worn, pitted, or fused contacts — your system may hum loudly, fail to start, run continuously without shutting off, or simply not respond when cooling is called for.

  • Specs: 2-pole configuration | 24V AC coil voltage | Rated for single-phase compressor and condenser fan loads | Direct OEM replacement for part number HN51KB024
  • OEM vs Generic: OEM contactors are manufactured to exact factory contact ratings and coil pull-in voltages, ensuring reliable switching under high-load summer conditions. Generic contactors may use thinner contact material that pits faster and draws inconsistent coil current, leading to premature failure.
  • Install difficulty: 2/5 — Always shut off power at both the disconnect box and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor to ensure correct re-termination.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse when ordered before cutoff time.

Compatibility: This contactor is the direct OEM replacement for the Payne PA1ZNA042000AAAA (4-ton) split-system air conditioner. Verify your existing contactor's pole count and coil voltage against your unit's data plate before ordering. Our fitment specialists are available to confirm compatibility before you buy — no guesswork required. Order today and get your system back up and running fast.

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 PA1ZNA042000AAAA?
Yes. This is the factory-specified OEM contactor for the Payne PA1ZNA042000AAAA. 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 PA1ZNA042000AAAA?
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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