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OEM Carrier Contactor 1-Pole 24V 25A for PY3PNA030040AB — HN51KB024
Carrier

OEM Carrier Contactor 1-Pole 24V 25A for PY3PNA030040AB — HN51KB024

SKU: CARRIE-PY3PNA030040AB-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HN51KB024 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 1-Pole Contactor 24V 25 Amp for Model PY3PNA030040AB — HN51KB024

This is the genuine OEM Carrier contactor (part #HN51KB024) factory-specified for the Carrier PY3PNA030040AB packaged unit. The contactor is the high-voltage switching relay that energizes the compressor and/or condenser fan motor every time your thermostat calls for cooling. When the 24V coil receives a signal from the control board, the contactor closes its contacts to pass line voltage to the load. When it fails, symptoms include the system humming but not starting, the unit refusing to shut off (welded contacts), chattering or buzzing noises from the electrical compartment, or a completely dead outdoor unit despite a valid thermostat call.

  • Specs: 1-Pole | 24V AC 50/60Hz Coil | 25 FLA (Full Load Amps) | Definite purpose contactor | OEM Part #HN51KB024
  • OEM vs Generic: This factory OEM contactor is built to exact Carrier tolerances for coil pull-in voltage, contact gap, and arc suppression. Generic aftermarket contactors often use lower-grade silver alloy contacts that pit and weld prematurely, leading to callback failures within one season.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before disconnecting any terminals. Verify coil voltage with a multimeter before condemning the contactor.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Fits Carrier model PY3PNA030040AB packaged unit as the factory-specified single-pole contactor. Always cross-reference your unit's data plate and wiring diagram to confirm pole count, coil voltage, and amperage before ordering. Our team is available to verify fitment — contact us before you buy if you have any questions. Order today for same-day shipping.

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 PY3PNA030040AB — HN51KB024?
Yes. This is the factory-specified OEM contactor for the Carrier PY3PNA030040AB — HN51KB024. 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 PY3PNA030040AB — HN51KB024?
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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