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OEM Carrier Contactor 24V Coil 2-Pole for PH4ANG018000BAAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH4ANG018000BAAA

SKU: CARRIE-PH4ANG018000BAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PH4ANG018000BAAA — 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 PH4ANG018000BAAA

This OEM replacement contactor (part number HN51KC024) is the factory-specified high-voltage switching relay for the Carrier PH4ANG018000BAAA heat pump system. The contactor acts as the electrical bridge between your 24V thermostat control signal and the high-voltage power supply to the compressor and condenser fan motor. When the contactor fails, the most common symptom is an air conditioning or heat pump system that simply will not turn on — the thermostat calls for cooling or heating, but nothing happens at the outdoor unit.

  • Specs: 24V AC coil voltage | 2-pole configuration | Factory-matched contact ratings | OEM part number HN51KC024 | Direct drop-in replacement, no modifications required
  • OEM vs Generic: This OEM contactor is manufactured to Carrier's exact coil voltage and contact amperage specifications. Generic contactors frequently use lower-grade contact materials that pit and burn faster under load, leading to premature failure and potential compressor damage.
  • Install difficulty: 3/5 — Always shut off power at both the disconnect and the breaker panel before beginning work. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Contact terminals carry line voltage — exercise extreme caution.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PH4ANG018000BAAA. Always verify coil voltage and pole configuration against your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order 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 PH4ANG018000BAAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH4ANG018000BAAA. 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 PH4ANG018000BAAA?
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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