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OEM Carrier 40A Contactor 2-Pole 24V Coil for C4850C50AJ02551
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for C4850C50AJ02551

SKU: CARRIE-C4850C50AJ02551-CONTACTOR-HN53CB115 Brand: Carrier
✓ Guaranteed to fit C4850C50AJ02551 — 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 C4850C50AJ02551

This is the factory OEM replacement contactor for the Carrier C4850C50AJ02551 packaged unit. The contactor is the high-voltage switching relay that closes the 240V power circuit to the compressor and condenser fan motor each time the thermostat sends a 24V call for cooling. When a contactor fails — due to pitted or burned contact points, a stuck plunger, or a failed coil — the system will either refuse to start entirely, run continuously without shutting off, or chatter and short-cycle under load. Replacing a failed contactor is one of the most common and cost-effective HVAC repairs available.

  • Specs: 2-Pole configuration | 24V AC coil voltage | 30–40A load rating | Replaces OEM part numbers HN53CB115 and HN53HF122 | Factory-matched contact material and coil pull-in voltage
  • OEM vs Generic: OEM contactors use silver-alloy contact tips rated for the exact duty cycle of your Carrier unit. Generic contactors often use lower-grade contacts that pit faster under compressor inrush current, leading to repeat failures within one to two seasons.
  • Install difficulty: 2/5 — Shut off power at the disconnect and confirm zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers. Photograph all wiring before removing the old contactor. Transfer one wire at a time to avoid miswiring. Total job typically takes 20–30 minutes.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier C4850C50AJ02551 packaged unit. Cross-references OEM part numbers HN53CB115 and HN53HF122. Always verify pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back online fast.

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 C4850C50AJ02551?
Yes. This is the factory-specified OEM contactor for the Carrier C4850C50AJ02551. 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 C4850C50AJ02551?
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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