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OEM Carrier 2-Pole Contactor 24V Coil 30A for C50A504021 — Ships Today
Carrier

OEM Carrier 2-Pole Contactor 24V Coil 30A for C50A504021 — Ships Today

SKU: CARRIE-C50A504021-CONTACTOR-HN53CB115 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil 30A for Model C50A504021

This OEM contactor is the factory-specified high-voltage relay replacement for the Carrier C50A504021 packaged unit. The contactor acts as the primary electrical switch that connects line voltage to the compressor and condenser fan motor when the thermostat signals a cooling call. When the contactor fails — due to pitted contacts, coil burnout, or a stuck-open position — the result is an air conditioner that simply won't turn on, hums without starting, or loses cooling capacity intermittently. Replaces OEM part numbers HN53CB115, HN53CD115, and HN53HF122.

  • Specs: 2-Pole configuration | 24V AC coil voltage | 30A contact rating | Factory-matched coil pull-in voltage for reliable thermostat signaling | NEMA-rated enclosure contacts
  • OEM vs Generic: OEM contactors use silver-alloy contacts rated for thousands of switching cycles. Generic aftermarket units often use lower-grade contact materials that pit and weld prematurely, leading to repeat failures and potential compressor damage — not a risk worth taking on a high-load component.
  • Install difficulty: 2/5 — Always disconnect power at the disconnect box and confirm zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Label each wire. Installation typically takes 20–30 minutes for an experienced DIYer or technician.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before 3 PM EST ship same business day from our stocked warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier C50A504021 packaged unit. Cross-references OEM part numbers HN53CB115, HN53CD115, and HN53HF122. Verify coil voltage (24V) and pole configuration on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us before placing your order.

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 C50A504021 — Ships Today?
Yes. This is the factory-specified OEM contactor for the Carrier C50A504021 — Ships Today. 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 C50A504021 — Ships Today?
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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