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OEM Carrier Contactor 1-Pole 30A 24V Coil for PY4GNAB30040AA
Carrier

OEM Carrier Contactor 1-Pole 30A 24V Coil for PY4GNAB30040AA

SKU: CARRIE-PY4GNAB30040AA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PY4GNAB30040AA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 1-Pole Contactor 30 Amp 24V Coil — HN51KC024 for Model PY4GNAB30040AA

This is the genuine OEM factory-replacement contactor for the Carrier PY4GNAB30040AA packaged or split-system unit. The contactor is the high-voltage relay that bridges line voltage (240V) to the compressor and condenser fan motor whenever the thermostat sends a 24V call for cooling. When this part fails, you'll typically experience one or more of the following: the system completely fails to start, the contactor chatters or hums audibly at the unit, the compressor runs continuously even with the thermostat off (welded contacts), or the unit trips the breaker on startup. Replacing this part is one of the most common and cost-effective AC repairs available.

  • Specs: 1-pole configuration | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 24 VAC coil voltage | 50/60 Hz | OEM part number HN51KC024
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact OEM contact-gap tolerances and coil resistance specs. Generic contactors often use lower-grade silver alloy contacts that pit faster under load, shortening service life — especially critical for compressors drawing high LRA on startup.
  • Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before opening the control compartment. Photograph all wiring before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester. Verify 24V pull-in with a thermostat call after installation. Average install time: 20–30 minutes.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY4GNAB30040AA. Also cross-references to P282-0311, HN51CC024, P282-1304, P282-1305, P282-1308, and other superseded part numbers. Always verify the part number against your unit's wiring diagram or data plate before ordering. Need fitment confirmation? 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 PY4GNAB30040AA?
Yes. This is the factory-specified OEM contactor for the Carrier PY4GNAB30040AA. 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 PY4GNAB30040AA?
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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