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OEM Carrier 40A Contactor 2-Pole 24V Coil for CA16NA03000GAABA
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for CA16NA03000GAABA

SKU: CARRIE-CA16NA03000GAABA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit CA16NA03000GAABA — 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 CA16NA03000GAABA

This OEM contactor (part# HN51KC024) is the factory-specified replacement for the Carrier CA16NA03000GAABA single-stage split-system air conditioner. The contactor is a high-voltage relay controlled by a 24V signal from your thermostat. When the thermostat calls for cooling, the contactor closes and delivers line voltage to the compressor and condenser fan motor. A failed contactor means your outdoor unit simply won't respond — you may hear a click at the thermostat but see zero activity at the condenser, or the unit may run continuously due to welded contacts.

  • Specs: 2-Pole configuration | 24V coil voltage | 30–40A contact rating | Direct OEM replacement — Part# HN51KC024 | Factory-matched electrical tolerances for reliable switching
  • OEM vs Generic: OEM contactors use silver-alloy contact tips rated for thousands of switching cycles. Generic alternatives often use lower-grade alloys that pit and weld prematurely, leading to compressor damage or a unit that won't shut off.
  • 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, and wire labels or tape. Photograph all wiring connections before removing the old contactor. Line and load terminals must be correctly identified — do not reverse.
  • Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day when ordered before 3 PM EST.

Compatibility: Engineered specifically for the Carrier CA16NA03000GAABA 3-ton split-system air conditioner. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back up and running today.

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 CA16NA03000GAABA?
Yes. This is the factory-specified OEM contactor for the Carrier CA16NA03000GAABA. 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 CA16NA03000GAABA?
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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