Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Contactor 24V Coil 2-Pole for PH10JA018000AGAA
Carrier

OEM Carrier Contactor 24V Coil 2-Pole for PH10JA018000AGAA

SKU: CARRIE-PH10JA018000AGAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PH10JA018000AGAA — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 24V Coil 2-Pole for Model PH10JA018000AGAA

This is the factory-specified OEM replacement contactor for the Carrier PH10JA018000AGAA heat pump system. The contactor is the high-voltage relay that physically closes the circuit between the line voltage power supply and your compressor and condenser fan motor every time the thermostat calls for cooling or heating. When the contactor fails, the most common symptoms are an AC or heat pump that simply will not turn on, a buzzing or chattering noise from the outdoor unit, or burned/pitted contact points visible on inspection. Replacing a worn contactor promptly protects your compressor — the most expensive component in the system — from the voltage irregularities caused by a failing switch.

  • Specs: OEM Part No. HN51KC024 | 2-Pole configuration | 24V control coil | Factory-matched contact rating for Carrier PH10JA018000AGAA — verify amperage on your unit's data plate
  • OEM vs Generic: This OEM contactor uses factory-spec contact material and coil windings that match exact pull-in and drop-out voltages. Generic contactors may use inferior contact alloys that pit faster under load, causing repeat failures within one season.
  • Install Difficulty: 3/5 — LINE VOLTAGE IS PRESENT in the outdoor disconnect and unit. Always shut off the outdoor disconnect AND the breaker before beginning work. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, camera/phone to photograph wiring before removal. Wire-for-wire replacement is straightforward once power is confirmed off.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model PH10JA018000AGAA. Always cross-reference the part number on your existing contactor's label and confirm coil voltage and pole count before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.

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 PH10JA018000AGAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH10JA018000AGAA. 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 PH10JA018000AGAA?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online