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OEM Carrier Contactor 1-Pole 24V 30A for PH4RNG042000BAAA
Carrier

OEM Carrier Contactor 1-Pole 24V 30A for PH4RNG042000BAAA

SKU: CARRIE-PH4RNG042000BAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PH4RNG042000BAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 1-Pole Contactor 24V 30A for Model PH4RNG042000BAAA (HN51KC024)

This is the genuine OEM factory-specified contactor for the Carrier PH4RNG042000BAAA heat pump system. The contactor is a high-voltage switching relay controlled by the 24V thermostat circuit — when the thermostat calls for cooling or heating, it energizes the contactor coil, pulling the contacts down to deliver line voltage to the compressor. When the contactor fails, symptoms range from the unit refusing to start (open coil or pitted contacts) to running continuously and unable to shut off (welded/stuck contacts). You may also hear audible chattering or humming from the contactor itself.

  • Specs: 1-Pole | 24 VAC Coil Voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM Part # HN51KC024
  • OEM vs Generic: This OEM unit is factory-matched to Carrier specifications for exact dimensional fit, coil pull-in voltage, and contact gap. Generic contactors often use lower-grade contact materials prone to premature pitting and arcing, shortening compressor life and risking nuisance lockouts.
  • Install Difficulty: 2/5 — Disconnect and lock out all power before opening the unit. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph existing wiring before disconnecting. Verify coil pull-in with a 24V call after installation. Line and load terminals must be correctly torqued per the wiring diagram.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Factory-specified replacement for Carrier model PH4RNG042000BAAA. Cross-references include P282-0311, HN51CC024, 301362-101, and P282-1304. Verify your unit's data plate and parts list confirm HN51KC024 before ordering. Have a compatibility question? Our HVAC parts specialists verify fitment before you buy — contact us 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 PH4RNG042000BAAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH4RNG042000BAAA. 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 PH4RNG042000BAAA?
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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