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OEM Carrier Contactor 2-Pole 24V Coil for FIOP300C511GA — HN51KC024
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for FIOP300C511GA — HN51KC024

SKU: CARRIE-FIOP300C511GA-CONTACTOR-HN51KC024 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier 2-Pole Contactor 24V Coil for Model FIOP300C511GA — HN51KC024

This is the factory OEM replacement contactor for the Carrier FIOP300C511GA packaged unit, sold under OEM part number HN51KC024. The contactor is a high-voltage relay that receives a 24V signal from the thermostat and closes the circuit to send line voltage to the compressor and condenser fan motor. When the contactor fails — due to pitted contacts, a burned coil, or a stuck plunger — the system will either fail to start entirely, run continuously without shutting off, or trip a breaker repeatedly.

  • Specs: 2-pole configuration | 24V coil voltage | Rated for high-amperage compressor loads | Factory-matched contact material and coil resistance for FIOP300C511GA
  • OEM vs Generic: OEM contactors like HN51KC024 use precision-matched contact alloys and coil windings specified by Carrier engineering. Aftermarket contactors often use lower-grade contact materials that pit faster under load, shortening service life significantly in high-cycle applications.
  • Install difficulty: 3/5 — Always disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire labels or phone camera to document terminal wiring before removal. Transfer wires one at a time to avoid miswiring.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier FIOP300C511GA packaged unit. Always verify coil voltage, pole count, and amperage rating on your existing contactor's data label before ordering to ensure proper fitment. Our HVAC parts specialists are available to confirm compatibility before you buy — order with confidence and get your system back online fast.

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 FIOP300C511GA — HN51KC024?
Yes. This is the factory-specified OEM contactor for the Carrier FIOP300C511GA — HN51KC024. 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 FIOP300C511GA — HN51KC024?
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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