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OEM Carrier Contactor 24V 2-Pole for PH10JA018000AAAA — HN51KB024
Carrier

OEM Carrier Contactor 24V 2-Pole for PH10JA018000AAAA — HN51KB024

SKU: CARRIE-PH10JA018000AAAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HN51KB024 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 24V 2-Pole for Model PH10JA018000AAAA (HN51KB024)

This OEM contactor is the factory-specified replacement part HN51KB024 for the Carrier PH10JA018000AAAA system. The contactor is the high-voltage relay that bridges the 24V control circuit signal from your thermostat to the high-voltage supply feeding the compressor and condenser fan motor. When it fails, the most common symptoms include the outdoor unit failing to energize at all, the compressor not starting despite the indoor unit running, or audible buzzing/chattering at the contactor itself caused by worn or pitted contact points.

  • Specs: 24V coil voltage | 2-pole configuration | Factory-matched contact rating | Direct OEM replacement for part number HN51KB024
  • OEM vs Generic: This is the exact OEM part sourced from Carrier. OEM contactors feature factory-rated contact surfaces and coil windings, ensuring proper pull-in voltage and long service life. Generic alternatives often use inferior contact materials that pit and arc prematurely, leading to repeat failures.
  • Install Difficulty: 3/5 — Work must be performed with power fully disconnected at the disconnect box and breaker panel. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removal. Line-voltage terminals are present — exercise extreme caution.
  • Warranty: 1-year OEM factory warranty. Orders placed by cutoff time ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PH10JA018000AAAA. Always verify OEM part number HN51KB024 against your unit's data plate or existing contactor label before ordering. Not sure it fits? Our HVAC parts specialists are available to confirm fitment before you buy — same-day shipping available on all stocked OEM parts.

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 PH10JA018000AAAA — HN51KB024?
Yes. This is the factory-specified OEM contactor for the Carrier PH10JA018000AAAA — HN51KB024. 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 PH10JA018000AAAA — HN51KB024?
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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