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OEM Carrier 40A Contactor 2-Pole 24V Coil for C48A502551
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for C48A502551

SKU: CARRIE-C48A502551-CONTACTOR-HN53CB115 Brand: Carrier
✓ Guaranteed to fit C48A502551 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor for Model C48A502551 Packaged Unit

This OEM replacement contactor is the factory-specified high-voltage relay for the Carrier C48A502551 packaged unit. The contactor acts as the primary switch that closes the high-voltage circuit to the compressor and condenser fan motor when the thermostat calls for cooling. A failed contactor is one of the most common reasons an air conditioning system will not turn on — symptoms include a clicking or buzzing sound with no compressor start, burned or pitted contact points, or a coil that fails to pull in despite receiving the 24V control signal. Replaces OEM part numbers HN53CB115 and HN53HF122.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40A load rating | Factory-matched contact material and coil pull-in voltage for reliable switching under full load conditions
  • OEM vs Generic: This OEM contactor uses factory-grade silver-alloy contact points rated to manufacturer specifications. Generic contactors frequently use lower-grade contact material that pits faster under repeated switching, shortening service life — especially in high-cycle cooling climates.
  • Install Difficulty: 3/5 — Always disconnect power at the breaker AND disconnect switch before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Verify coil voltage with a multimeter prior to replacement to rule out a control board or transformer fault.
  • 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 the Carrier C48A502551 packaged unit. Cross-references OEM part numbers HN53CB115 and HN53HF122. Always confirm pole count, amperage rating, and coil voltage against your unit's data plate and existing contactor label before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us 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 C48A502551?
Yes. This is the factory-specified OEM contactor for the Carrier C48A502551. 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 C48A502551?
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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