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OEM Carrier Contactor Replacement C50A503511 for Model C50A503511

SKU: carrier-contactor-c50a503511 Brand: Carrier
$39.95

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Carrier Contactor Replacement C50A503511 for Model C50A503511

Keep your system cooling reliably with this genuine OEM Carrier contactor (C50A503511), the heavy-duty switch that connects line voltage to the compressor and condenser fan motor on a cooling demand. The contactor coil energizes from a low-voltage thermostat signal, pulling the contacts closed to power these high-draw components. As contacts arc and erode over time, you may notice no-cooling, buzzing, hard starts, or a unit that won't cycle off. Designed as a direct OEM replacement for Carrier model C50A503511, it preserves the original coil voltage, pole configuration, and current rating for safe, proper operation. Installation is moderate and DIY-friendly for those comfortable with line-voltage wiring: disconnect power at the breaker and disconnect box, transfer wires one at a time to maintain correct connections, and fasten the new contactor. Plan on 20-30 minutes with a screwdriver and nut driver, and always confirm power is off first. OEM build quality ensures crisp switching and long life. In stock now and shipping same-day on orders before 3PM CST.

Compatibility

This part is compatible with Carrier model C50A503511.

Shipping

Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.

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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Contactor fit my Carrier Model C50A503511?
Yes. This is the factory-specified OEM contactor for the Carrier Model C50A503511. 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 Model C50A503511?
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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