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OEM Carrier Contactor 24V 2-Pole for PH1PNB030000AAAA
Carrier

OEM Carrier Contactor 24V 2-Pole for PH1PNB030000AAAA

SKU: CARRIE-PH1PNB030000AAAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH1PNB030000AAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor HN51KB024 for Model PH1PNB030000AAAA

This OEM contactor (part number HN51KB024) is the factory-specified high-voltage relay for the Carrier PH1PNB030000AAAA heat pump system. The contactor acts as the primary power-switching relay, receiving a 24V signal from the thermostat control circuit and closing to send high-voltage power to the compressor and condenser fan motor. When the contactor fails — due to pitted or burned contacts, a stuck plunger, or a failed coil — the outdoor unit will not energize at all, or may run continuously without cycling off.

  • Specs: 24V AC coil voltage | 2-pole configuration | Rated for single-phase compressor and fan motor loads | Factory-matched contact material and coil resistance for Carrier heat pump systems
  • OEM vs Generic: This is a genuine OEM Carrier contactor manufactured to exact factory specifications. Generic contactors often use inferior contact alloys that pit faster under high-inrush compressor loads, leading to premature failure and potential compressor damage.
  • Install Difficulty: 2/5 — Always disconnect power at the breaker and verify voltage is absent with a multimeter before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Directly fits Carrier model PH1PNB030000AAAA heat pump systems. Always verify the coil voltage and pole configuration on your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by to verify compatibility before you buy — order with confidence and get same-day shipping.

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 PH1PNB030000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH1PNB030000AAAA. 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 PH1PNB030000AAAA?
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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