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OEM Carrier 40A Contactor 24V Coil 2-Pole for PY1PNA042100ADBA
Carrier

OEM Carrier 40A Contactor 24V Coil 2-Pole for PY1PNA042100ADBA

SKU: CARRIE-PY1PNA042100ADBA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PY1PNA042100ADBA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 24V Coil 2-Pole for Model PY1PNA042100ADBA

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier PY1PNA042100ADBA packaged unit. The contactor is a high-voltage relay that receives a low-voltage (24V) signal from the thermostat or control board and switches line voltage to the compressor and condenser fan motor. When the contactor fails — due to pitted or burned contacts, a stuck plunger, or a failed coil — the system will either refuse to start entirely, run continuously without shutting off, or short-cycle under load.

  • Specs: 2-Pole configuration | 24V AC coil voltage | 40A contact rating | Direct OEM factory replacement for part number HN51KB024
  • OEM vs Generic: This OEM contactor uses factory-spec silver-alloy contacts and a precision-wound coil, delivering tighter pull-in voltage tolerance and longer service life versus generic contactors that may use inferior contact materials prone to early pitting.
  • Install difficulty: 3/5 — Requires disconnecting line-voltage power at the disconnect box before servicing. Tools needed: flathead and Phillips screwdrivers, 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter (to verify coil continuity and contact resistance). Always photograph existing wiring before removal.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier PY1PNA042100ADBA packaged unit. Always confirm coil voltage and pole configuration on your unit's data plate before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you buy 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 PY1PNA042100ADBA?
Yes. This is the factory-specified OEM contactor for the Carrier PY1PNA042100ADBA. 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 PY1PNA042100ADBA?
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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