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OEM Carrier 2-Pole 24V Coil 40A Contactor for C48A402751 (HN53CB115) | National HVAC Parts
Carrier

OEM Carrier 2-Pole 24V Coil 40A Contactor for C48A402751 (HN53CB115) | National HVAC Parts

SKU: CARRIE-C48A402751-CONTACTOR-HN53CB115 Brand: Carrier
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Texas CMBL #19328542014
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OEM Carrier 2-Pole Contactor 24V Coil for Model C48A402751

This OEM replacement contactor is the factory-specified part for the Carrier C48A402751 packaged unit. The contactor acts as a high-voltage relay, receiving a 24V signal from the thermostat or control board to close its contacts and deliver line voltage to the compressor and condenser fan motor. When a contactor fails — due to pitted contacts, a burned coil, or contact welding — the air conditioning system will either refuse to start entirely, run continuously without cycling off, or trip the breaker repeatedly. Replacing this contactor with a genuine OEM part restores reliable switching performance and protects downstream components from voltage irregularities.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40A contact rating | Factory-matched to Carrier C48A402751 electrical design | Replaces OEM part numbers HN53CB115 and HN53HF122
  • OEM vs Generic: OEM contactors use silver-alloy contact tips rated for the exact switching load of this unit. Generic contactors often substitute lower-grade contacts that pit faster under repeated cycling, leading to premature failure — especially in high-cycle summer conditions.
  • Install difficulty: 3/5 — Always disconnect power at the breaker AND verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, non-contact voltage tester. Photograph all wiring connections before removal. Line-voltage terminals carry lethal voltage — if unsure, hire a licensed HVAC technician.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before 3 PM ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier C48A402751 packaged unit. Cross-references OEM part numbers HN53CB115 and HN53HF122. Verify coil voltage and pole configuration on your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.

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 C48A402751 (HN53CB115) | National HVAC Parts?
Yes. This is the factory-specified OEM contactor for the Carrier C48A402751 (HN53CB115) | National HVAC Parts. 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 C48A402751 (HN53CB115) | National HVAC Parts?
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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