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OEM Carrier Contactor 24V Coil 2-Pole for PH3ZNA030000AA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH3ZNA030000AA

SKU: CARRIE-PH3ZNA030000AA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH3ZNA030000AA — 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 PH3ZNA030000AA

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier PH3ZNA030000AA system. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat or control board. It physically closes the circuit to power the compressor and condenser fan motor each time a cooling call is made. When the contactor fails — due to worn or pitted contact points — the system may hum without starting, fail to energize at all, or remain locked on even after the thermostat is satisfied.

  • Specs: 24V AC coil | 2-pole design | Factory-matched amperage rating | Direct OEM replacement for Carrier part HN51KB024
  • OEM vs Generic: This is a genuine Carrier OEM contactor, manufactured to exact factory specifications. Generic aftermarket contactors often use lower-grade contact materials that pit faster under load, leading to premature failure and potential compressor damage.
  • Install difficulty: 3/5 — High-voltage component; always disconnect power at the disconnect box and verify voltage is absent with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removing the old contactor.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PH3ZNA030000AA. Always verify your existing contactor's coil voltage (24V) and pole configuration against your unit's data plate before ordering. Our team is 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 PH3ZNA030000AA?
Yes. This is the factory-specified OEM contactor for the Carrier PH3ZNA030000AA. 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 PH3ZNA030000AA?
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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