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 1-Pole 24V 30A for PH15NB02400GBAAA
Carrier

OEM Carrier Contactor 1-Pole 24V 30A for PH15NB02400GBAAA

SKU: CARRIE-PH15NB02400GBAAA-CONTACTOR-HN51KC024 Brand: Carrier
✓ Guaranteed to fit PH15NB02400GBAAA — 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 1-Pole Contactor 24V 30A (HN51KC024) for Model PH15NB02400GBAAA

This OEM single-pole contactor is the factory-specified replacement for the Carrier PH15NB02400GBAAA heat pump. The contactor is the high-voltage relay that receives a low-voltage (24V) signal from your thermostat and closes to send line voltage to the compressor and condenser fan motor. When it fails, the most common symptoms are an AC or heat pump that won't turn on at all, an audible chattering or humming noise from the outdoor unit, or — in the case of welded/stuck contacts — a system that runs continuously and won't shut off even when the thermostat is satisfied. Pitted or burned contacts from years of high-current switching are the #1 cause of no-cool calls in summer.

  • Specs: 1-Pole (single-pole) | 24 VAC coil voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM part number HN51KC024
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact tolerances for the PH15NB02400GBAAA. Generic aftermarket contactors may use lighter-gauge contacts that pit and weld sooner, shortening compressor life and increasing nuisance service calls.
  • Install difficulty: 2/5 — Shut off power at both the disconnect and breaker before starting. Photograph all wiring before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester. Verify 24V coil pull-in with a multimeter after install. Note: low-voltage (coil) wire positions may differ slightly between old and new unit — always follow the unit wiring diagram.
  • Warranty & Shipping: 1-year OEM factory warranty against defects. Ships same business day from our warehouse. Order by 3PM local time for guaranteed same-day dispatch.

Compatibility: Direct OEM replacement for Carrier model PH15NB02400GBAAA. Also cross-references to Bryant, Payne, and Day & Night units specifying part HN51KC024. Always verify the part number on your existing contactor's label or your unit's wiring diagram before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.

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 PH15NB02400GBAAA?
Yes. This is the factory-specified OEM contactor for the Carrier PH15NB02400GBAAA. 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 PH15NB02400GBAAA?
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