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OEM Carrier Contactor 24V Coil 2-Pole for PY3PNA018040NA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PY3PNA018040NA

SKU: CARRIE-PY3PNA018040NA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PY3PNA018040NA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model PY3PNA018040NA

This is the factory-specified OEM replacement contactor for the Carrier PY3PNA018040NA packaged unit. The contactor is the high-voltage relay that responds to your thermostat's 24V signal and closes the circuit to deliver line voltage to the compressor and condenser fan motor. When a contactor fails, symptoms include the system failing to turn on at all, a loud humming or chattering from the outdoor unit, or visible pitting and burning on the contactor's contact points.

  • Specs: OEM Part Number HN51KB024 | 2-Pole design | 24V control coil | Factory-matched contact rating for Carrier PY3PNA018040NA — verify amperage on your unit's data plate before ordering
  • OEM vs Generic: This OEM contactor meets Carrier's exact coil voltage, contact gap, and ampacity tolerances. Generic contactors often use inferior contact materials that pit faster under inductive load, leading to premature failure and potential compressor damage.
  • Install difficulty: 3/5 — Always disconnect and lock out power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removal. The line-voltage terminals must be treated as live hazards until power is confirmed off.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our NationalHVACParts.com warehouse when ordered before 3PM local time.

Compatibility: Designed for the Carrier PY3PNA018040NA packaged unit using OEM part number HN51KB024. Always cross-reference the part number on your existing contactor's label and confirm coil voltage and pole count match your application before installing. Our parts specialists are available to verify 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 PY3PNA018040NA?
Yes. This is the factory-specified OEM contactor for the Carrier PY3PNA018040NA. 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 PY3PNA018040NA?
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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