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OEM Carrier 40A Contactor 2-Pole 24V Coil for CA15NA03000GAAAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for CA15NA03000GAAAA

SKU: CARRIE-CA15NA03000GAAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit CA15NA03000GAAAA — 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 CA15NA03000GAAAA

This is the factory OEM replacement contactor for the Carrier CA15NA03000GAAAA split-system air conditioner, sold under OEM part number HN51KC024. The contactor is the high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to power the compressor and condenser fan motor. When the contactor fails — whether from pitted contacts, a burned coil, or a stuck plunger — the result is an AC unit that hums but won't start, trips the breaker, or simply does nothing when the thermostat calls for cooling.

  • Specs: 2-Pole configuration | 24V AC coil voltage | 30–40 amp contact rating | Replaces OEM part number HN51KC024 | Factory-matched contact material and coil resistance
  • OEM vs Generic: OEM contactors use factory-spec silver-alloy contact tips and precision-wound coils that meet Carrier's exact pull-in and drop-out voltage tolerances. Generic contactors often use lower-grade contact materials that pit and arc more rapidly, leading to premature failure and potential compressor damage.
  • Install difficulty: 2/5 — Always disconnect power at the breaker and verify zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wire connections before removing the old contactor. Note: contacts carry line voltage — exercise caution.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before 3PM ship same business day from our climate-controlled warehouse.

Compatibility: Designed and factory-specified for the Carrier CA15NA03000GAAAA single-stage split-system condenser. Always confirm coil voltage and pole configuration on your unit's data plate before ordering. Our HVAC parts specialists are available to verify fitment before you purchase — no guesswork, no returns.

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 CA15NA03000GAAAA?
Yes. This is the factory-specified OEM contactor for the Carrier CA15NA03000GAAAA. 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 CA15NA03000GAAAA?
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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