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OEM Carrier Contactor 1-Pole 24V 25A for PH10JA01800GAEAA
Carrier

OEM Carrier Contactor 1-Pole 24V 25A for PH10JA01800GAEAA

SKU: CARRIE-PH10JA01800GAEAA-CONTACTOR-HN51KB024 Brand: Carrier
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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 1-Pole Contactor 24V 25 Amp for Model PH10JA01800GAEAA — Part# HN51KB024

This is the OEM factory-specified contactor for the Carrier PH10JA01800GAEAA packaged unit. The contactor is the high-voltage switching relay at the heart of your system's electrical circuit — when the thermostat sends a 24V call for cooling or heating, the contactor coil energizes, closing the main contacts and delivering line voltage to the compressor and/or condenser fan motor. When a contactor fails, symptoms range from a complete no-start condition (coil won't pull in) to a stuck-on unit that won't shut off (contacts welded from heat and arcing), or intermittent compressor cycling that causes repeated tripping. Left unaddressed, a failing contactor can burn wiring, damage the compressor, and void equipment warranties.

  • Specs: 1-Pole (Single Pole) | 24V AC 50/60Hz Coil | 25 FLA (Full Load Amps) | 35 RES | Factory OEM part number HN51KB024
  • OEM vs Generic: This is a genuine Carrier OEM contactor built to exact factory contact gap, coil resistance, and thermal ratings. Generic aftermarket contactors frequently use lower-grade silver-alloy contacts that pit and weld faster under high-cycle load — especially in packaged units like the PH10JA01800GAEAA that cycle frequently in peak season.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph all wire terminations before removal. Discharge any capacitors in the panel before reaching near adjacent components. Swap wires one at a time to avoid miswiring the load and line lugs.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as the direct OEM replacement for Carrier model PH10JA01800GAEAA. Always verify your unit's wiring diagram and confirm the 1-pole, 24V coil specification on your original contactor's data label before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your unit back online 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 PH10JA01800GAEAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH10JA01800GAEAA. 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 PH10JA01800GAEAA?
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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