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OEM Carrier Contactor 24V Coil 2-Pole for PH3ZNA036000AA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH3ZNA036000AA

SKU: CARRIE-PH3ZNA036000AA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH3ZNA036000AA — 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 PH3ZNA036000AA

This is the factory OEM replacement contactor (part# HN51KB024) for the Carrier PH3ZNA036000AA split-system heat pump or condensing unit. The contactor is a high-voltage relay that acts as the primary on/off switch for your 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 powering the compressor. When a contactor fails, the most common symptoms are an air conditioner or heat pump that simply will not turn on, buzzing or chattering at the contactor, or visible pitting and burning on the contact surfaces.

  • Specs: OEM Part# HN51KB024 | 2-Pole design | 24V AC coil voltage | Rated for high-amperage compressor loads | Direct factory-spec replacement
  • OEM vs Generic: This OEM contactor is manufactured to Carrier's exact contact material, coil pull-in voltage, and amperage rating specifications. Generic aftermarket contactors may use lower-grade contact alloys that pit and fail faster under the high inrush current of scroll compressors.
  • Install Difficulty: 2/5 — Always disconnect power at the breaker and wait 5 minutes before servicing. Tools needed: 1/4" and 5/16" nut drivers, flathead screwdriver, needle-nose pliers, and a multimeter to verify coil continuity. Photograph all wiring before removal.
  • Warranty: 1-year OEM factory warranty against defects. Orders ship same business day from our warehouse when placed before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PH3ZNA036000AA unit. Verify your existing contactor's coil voltage and pole configuration against your unit's wiring diagram before ordering. Our technical team is available to confirm fitment — reach out before you buy if you have any questions. In stock and ready to ship today.

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 PH3ZNA036000AA?
Yes. This is the factory-specified OEM contactor for the Carrier PH3ZNA036000AA. 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 PH3ZNA036000AA?
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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