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OEM Carrier 2-Pole Contactor 24V Coil for C4850C50AJ03551 | National HVAC Parts
Carrier

OEM Carrier 2-Pole Contactor 24V Coil for C4850C50AJ03551 | National HVAC Parts

SKU: CARRIE-C4850C50AJ03551-CONTACTOR-HN53CB115 Brand: Carrier
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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model C4850C50AJ03551

This OEM replacement contactor is the factory-specified high-voltage relay for the Carrier C4850C50AJ03551 packaged unit. The contactor acts as the main electrical switch that allows the thermostat's low-voltage (24V) signal to energize the high-voltage compressor and condenser fan motor circuits. When the contactor fails — due to pitted contacts, a burned coil, or stuck plunger — the result is an air conditioner that simply won't turn on, a compressor that won't engage, or a unit that runs continuously without cycling off. Replaces OEM part numbers HN53CB115, HN53HF122, and HN53HG120.

  • Specs: 2-pole configuration | 24V coil voltage | Factory-rated amperage for Carrier C4850C50AJ03551 | Heavy-duty silver-alloy contact tips for extended service life
  • OEM vs Generic: This OEM contactor is manufactured to Carrier's exact coil pull-in voltage and contact amp ratings. Generic contactors often use lower-grade contact materials that pit faster under load, leading to premature failure and potential compressor damage from voltage drop.
  • Install difficulty: 3/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor to ensure correct re-termination.
  • Warranty: 1-year OEM factory warranty included. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed for the Carrier C4850C50AJ03551 packaged unit. Cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120 — all three are confirmed compatible replacements for this model. Verify your existing contactor's pole count and coil voltage against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.

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 C4850C50AJ03551 | National HVAC Parts?
Yes. This is the factory-specified OEM contactor for the Carrier C4850C50AJ03551 | 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 C4850C50AJ03551 | 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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