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OEM Carrier Contactor 1-Pole 25A 24V for PH2PNB030000AA
Carrier

OEM Carrier Contactor 1-Pole 25A 24V for PH2PNB030000AA

SKU: CARRIE-PH2PNB030000AA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit PH2PNB030000AA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Single-Pole Contactor 25A 24V Coil — HN51KB024 for Model PH2PNB030000AA

This OEM Carrier contactor (part# HN51KB024) is the factory-specified replacement for the Carrier PH2PNB030000AA heat pump system. The contactor is a high-current relay controlled by the 24V thermostat circuit — when the thermostat calls for cooling or heating, the contactor closes and sends line voltage to the compressor and/or condenser fan motor. When it fails, the most common symptoms are the outdoor unit failing to energize at all, audible chattering or buzzing at the contactor, or burnt/pitted contact points visible on inspection.

  • Specs: 1-Pole (single pole) | 25A Full Load Amps (FLA) | 24V AC 50/60Hz Coil | Definite Purpose Contactor | Factory OEM part number HN51KB024
  • OEM vs Generic: OEM contactors feature factory-matched contact ratings and coil impedance, ensuring proper pull-in voltage and long contact life. Generic aftermarket contactors may use lower-grade contact materials that pit and weld faster under load, leading to premature failure.
  • Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Swap wires one at a time to avoid miswiring.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as the OEM replacement for Carrier model PH2PNB030000AA. Always verify your unit's data plate and existing contactor specs (poles, amperage, coil voltage) before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — contact us today and get back up and running 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 $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 PH2PNB030000AA?
Yes. This is the factory-specified OEM contactor for the Carrier PH2PNB030000AA. 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 PH2PNB030000AA?
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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