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OEM Carrier Single-Pole Contactor 30A 24V for PY4GNAA30040AA
Carrier

OEM Carrier Single-Pole Contactor 30A 24V for PY4GNAA30040AA

SKU: CARRIE-PY4GNAA30040AA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PY4GNAA30040AA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Single-Pole Contactor 30 Amp 24V Coil for Model PY4GNAA30040AA

This is the genuine OEM factory-specified contactor for the Carrier PY4GNAA30040AA packaged unit. The contactor is the high-voltage relay that connects line-voltage power to the compressor and condenser fan motor every time your thermostat calls for cooling. When the 24V control circuit energizes the coil, the contacts close and your system runs. When it fails — through pitted contacts, a burned coil, or welded tips — your AC may refuse to start, run continuously and fail to shut off, audibly chatter or hum, or short-cycle within seconds of starting. Replacing a failed contactor with the correct OEM part restores factory-matched reliability and protects your compressor from voltage irregularities caused by worn contact surfaces.

  • Specs: 1-Pole (single-pole) | 30A FLA (Full Load Amps) | 150A LRA (Locked Rotor Amps) | 24 VAC coil voltage | 50/60 Hz | OEM Part# HN51KC024
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact unit specifications. Generic contactors may differ in contact gap, coil impedance, and terminal layout — increasing risk of arcing, premature failure, and compressor damage over time.
  • Install difficulty: 2/5 — Always disconnect and lock out power at the disconnect box before opening the control compartment. Photograph all wiring before removal. Transfer line, load, and 24V coil leads one at a time. Verify contactor pull-in with a 24V call from the thermostat after installation. Tools needed: flat-head screwdriver, needle-nose pliers, multimeter.
  • Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PY4GNAA30040AA packaged unit and other Carrier, Bryant, and Payne models specifying OEM part number HN51KC024. Always cross-reference your unit's wiring diagram and data plate before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy — contact us 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 PY4GNAA30040AA?
Yes. This is the factory-specified OEM contactor for the Carrier PY4GNAA30040AA. 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 PY4GNAA30040AA?
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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