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OEM Carrier 40A Contactor 2-Pole 24V Coil for CA16NA03000GAAAA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for CA16NA03000GAAAA

SKU: CARRIE-CA16NA03000GAAAA-CONTACTOR-HN51KC024 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model CA16NA03000GAAAA

This OEM contactor is the factory-specified replacement for the Carrier CA16NA03000GAAAA split-system air conditioner. The contactor is a high-voltage relay that receives a low-voltage (24V) signal from the thermostat and switches line-voltage power to the compressor and condenser fan motor. When it fails — due to pitted contacts, a burned coil, or a stuck plunger — your system will either fail to start entirely, run continuously without shutting off, or trip the breaker on startup.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40A contact rating | Factory OEM part number HN51KC024 | Direct drop-in replacement, no wiring modifications required
  • OEM vs Generic: OEM contactors use silver-alloy contact tips rated to factory arc-interruption specs. Generic contactors often use lower-grade contacts that pit and weld prematurely under compressor inrush current, leading to repeat failures within a single season.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, non-contact voltage tester. Photograph all wiring before disconnecting terminals. Transfer wires one at a time to avoid miswiring.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Engineered for Carrier model CA16NA03000GAAAA split-system condensers. Verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Not sure it fits? Our HVAC parts team confirms fitment before you check out — 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 $75
  • 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 CA16NA03000GAAAA?
Yes. This is the factory-specified OEM contactor for the Carrier CA16NA03000GAAAA. 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 CA16NA03000GAAAA?
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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