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OEM Carrier Contactor 2-Pole 24V Coil for C50A406021
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for C50A406021

SKU: CARRIE-C50A406021-CONTACTOR-HN53CB115 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model C50A406021

This OEM contactor is the factory-specified replacement for the Carrier C50A406021 packaged rooftop unit. The contactor is a high-voltage relay that closes the circuit between your power supply and the compressor and condenser fan motor when the thermostat calls for cooling. When the contactor fails — due to pitted contacts, a burned coil, or a stuck plunger — your system will either refuse to start entirely, run continuously without shutting off, or trip breakers repeatedly. Replaces OEM part numbers HN53CB115, HN53HF122, and HN53HG120.

  • Specs: 2-Pole configuration | 24V control coil | Factory-rated amperage for compressor load | Direct OEM replacement with exact terminal layout and mounting footprint
  • OEM vs Generic: OEM contactors feature silver-alloy contact tips rated to factory specifications, ensuring reliable pull-in voltage and long contact life. Generic contactors often use inferior alloys that pit and corrode faster, leading to premature failure and potential compressor damage.
  • Install difficulty: 2/5 — Disconnect and lock out power at the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removal to ensure correct reinstallation.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed for the Carrier C50A406021 commercial packaged rooftop unit. Cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120 — all three are covered by this single replacement contactor. Verify pole count, coil voltage, and amperage rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy. Order now — in stock and ships today.

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 $75
  • 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 C50A406021?
Yes. This is the factory-specified OEM contactor for the Carrier C50A406021. 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 C50A406021?
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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