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OEM Carrier 40A Contactor 2-Pole 24V Coil for C4850C50AJ02751
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for C4850C50AJ02751

SKU: CARRIE-C4850C50AJ02751-CONTACTOR-HN53CB115 Brand: Carrier
✓ Guaranteed to fit C4850C50AJ02751 — 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 C4850C50AJ02751

This OEM replacement contactor is the factory-specified part for the Carrier C4850C50AJ02751 packaged unit. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when the thermostat calls for cooling, the contactor closes and delivers line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common causes of an air conditioning system that simply won't turn on, hums without starting, or runs continuously without shutting off due to welded contacts. Replaces OEM part numbers HN53CB115 and HN53HF122.

  • Specs: 2-pole configuration | 24V AC coil voltage | 30–40 amp contact rating | Factory-matched silver alloy contact points for long service life and reliable switching
  • OEM vs Generic: This OEM contactor meets Carrier's exact coil pull-in voltage and contact arc-resistance specifications. Generic contactors frequently use inferior contact materials that pit and weld prematurely, leading to repeat failures — especially in high-cycle commercial applications.
  • Install difficulty: 2/5 — Always shut off power at both the disconnect and the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removal. Swap one wire at a time to avoid miswiring.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C4850C50AJ02751 packaged unit. This part directly replaces OEM part numbers HN53CB115 and HN53HF122. Always confirm coil voltage and pole configuration on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you purchase — contact us anytime.

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 C4850C50AJ02751?
Yes. This is the factory-specified OEM contactor for the Carrier C4850C50AJ02751. 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 C4850C50AJ02751?
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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