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OEM Carrier Contactor 1-Pole 25A 24V for PY3GNA024040AB
Carrier

OEM Carrier Contactor 1-Pole 25A 24V for PY3GNA024040AB

SKU: CARRIE-PY3GNA024040AB-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PY3GNA024040AB — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Single-Pole Contactor 25A 24V Coil (HN51KB024) for Model PY3GNA024040AB

This is the genuine OEM Carrier contactor (part number HN51KB024), factory-specified for the Carrier PY3GNA024040AB packaged unit. The contactor is a high-voltage relay that closes the circuit to the compressor and/or condenser fan motor when the thermostat calls for cooling. When the contactor fails — due to burnt or pitted contacts, a failed coil, or a mechanically stuck plunger — the most common symptom is the outdoor unit not energizing at all, even when the thermostat is set correctly and the indoor air handler is running. A failed contactor can also cause the compressor to run continuously (welded contacts) or to short-cycle, both of which accelerate system wear.

  • Specs: 1 Pole (Single Pole) | 25A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 24V AC 50/60 Hz coil | OEM-matched contact geometry and coil resistance
  • OEM vs Generic: OEM contactors use factory-spec silver-alloy contacts rated for tens of thousands of switching cycles. Generic aftermarket contactors often use lower-grade contacts that pit and weld prematurely, leading to repeat failures within one season.
  • Install difficulty: 2/5 — Always shut off power at both the breaker and the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Discharge any residual voltage and verify 0V before touching terminals.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse on all in-stock orders.

Compatibility: Direct OEM replacement for Carrier model PY3GNA024040AB. Verify your unit's data plate confirms a single-pole contactor before ordering. Not sure? Our fitment team will confirm compatibility before you buy — no guesswork required.

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 PY3GNA024040AB?
Yes. This is the factory-specified OEM contactor for the Carrier PY3GNA024040AB. 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 PY3GNA024040AB?
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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