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OEM Carrier Contactor Replacement C50A503551 for Model C50A503551

SKU: carrier-contactor-c50a503551 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 C50A503551 for Model C50A503551

This genuine OEM Carrier contactor (C50A503551) is the high-amperage switch that routes line voltage to your compressor and condenser fan motor each time the thermostat demands cooling. A low-voltage coil draws the contacts together to energize these components; worn, pitted, or welded contacts result in no-cooling, loud buzzing, hard starts, or a system that short cycles. Manufactured as a direct replacement for Carrier model C50A503551, this contactor matches the factory coil voltage, pole arrangement, and current rating to keep your equipment running safely and as designed. Swapping it is a moderate job for anyone comfortable around line-voltage HVAC wiring: turn off power at the breaker and disconnect, label or photograph the wires, transfer them one at a time, and mount the replacement. The repair usually takes 20-30 minutes with basic hand tools, and you should always confirm power is off first. Genuine OEM build quality means crisp, reliable switching and extended service life. In stock now and shipping the same day on orders before 3PM CST.

Compatibility

This part is compatible with Carrier model C50A503551.

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 C50A503551?
Yes. This is the factory-specified OEM contactor for the Carrier Model C50A503551. 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 C50A503551?
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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