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OEM Carrier Contactor 2-Pole 24V Coil for PH11JA042000AAAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for PH11JA042000AAAA

SKU: CARRIE-PH11JA042000AAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PH11JA042000AAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 2-Pole 24V Coil for Model PH11JA042000AAAA

This OEM contactor (part number HN51KC024) is the factory-specified replacement for the Carrier PH11JA042000AAAA heat pump system. The contactor functions as a high-voltage relay, receiving a 24V signal from the control board and switching line voltage (typically 208–240V) to power the compressor and condenser fan motor. When a contactor fails, the system may hum without starting, fail to energize at all, or run continuously even when the thermostat signals it to shut off — symptoms caused by pitted or welded contact points that degrade over years of cycling.

  • Specs: 2-pole configuration | 24V AC coil voltage | Designed for 208–240V load circuits | Factory-matched contact gap and spring tension for reliable switching
  • OEM vs Generic: This is a genuine OEM Carrier part (HN51KC024), built to exact factory tolerances. Generic contactors often use lower-grade contact materials that pit faster under high-current switching loads, leading to premature failure and potential compressor damage.
  • Install difficulty: 3/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Contactor replacement is a common DIY repair but requires safe high-voltage work practices.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered specifically for the Carrier PH11JA042000AAAA heat pump. Always verify coil voltage and pole configuration against your unit's wiring diagram and data plate before ordering. Our fitment team is available to confirm compatibility before you purchase — ships fast from our stocked warehouse.

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 PH11JA042000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH11JA042000AAAA. 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 PH11JA042000AAAA?
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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