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OEM Carrier Contactor 2-Pole 24V Coil for C50A405021
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for C50A405021

SKU: CARRIE-C50A405021-CONTACTOR-HN53CD115 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model C50A405021

This OEM contactor is the factory-specified replacement for the Carrier C50A405021 packaged unit. The contactor is a high-voltage relay that receives a 24V signal from the thermostat or control board and closes the circuit to send line voltage to the compressor and condenser fan motor. When the contactor fails — due to worn or pitted contacts, a burned coil, or contacts that stick open or closed — the system will either fail to start entirely, run continuously without shutting off, or trip a breaker. This is one of the most commonly replaced components in any packaged HVAC system.

  • Specs: 2-pole configuration | 24V AC coil voltage | Replaces OEM part numbers HN53CD115 and HN53HF122 | Factory-matched contact ratings for Carrier C50A405021 packaged equipment
  • OEM vs Generic: This OEM contactor uses factory-grade silver-alloy contact tips rated for the exact load of your C50A405021 unit. Aftermarket contactors often use inferior contact materials that pit and corrode faster, leading to premature failure and potential compressor damage.
  • Install difficulty: 3/5 — Always disconnect power at the disconnect box AND breaker panel 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. Line-voltage terminals are present — exercise extreme caution.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model C50A405021 packaged units. Cross-references OEM part numbers HN53CD115 and HN53HF122. Verify your existing contactor's pole count and coil voltage against your unit's data plate before ordering. Our fitment specialists are available to confirm compatibility before you buy — same-day shipping means your system is back up and running 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 $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 C50A405021?
Yes. This is the factory-specified OEM contactor for the Carrier C50A405021. 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 C50A405021?
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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