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Carrier

OEM Carrier Contactor CSA0550H1D Replacement Part for HVAC Unit

SKU: carrier-contactor-csa0550h1d Brand: Carrier
$44.99

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

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OEM Carrier Contactor CSA0550H1D Replacement Part for HVAC Unit

The Carrier CSA0550H1D contactor is a genuine OEM switching relay that supplies high-voltage power to your HVAC compressor and outdoor fan motor on a call for cooling. The energized coil closes the contacts to power the condensing unit and releases them when cooling stops. Contacts that become pitted, burned, or stuck are a leading cause of no-cooling problems, chattering, and erratic cycling — replacing the contactor returns your system to smooth, dependable operation. Designed exactly for Carrier model CSA0550H1D, this part matches the original's amperage, coil voltage, and pole count for a guaranteed fit. The swap is a moderate DIY repair: cut power at the disconnect, photograph the wiring, transfer wires one at a time, and secure the new contactor in roughly 20 minutes. Confirm the circuit is dead before beginning work. Manufactured to genuine OEM specifications for long-lasting, reliable switching. In stock and ships same-day when your order is placed before 3PM CST.

Compatibility

This part is compatible with Carrier model CSA0550H1D.

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 HVAC Unit?
Yes. This is the factory-specified OEM contactor for the Carrier HVAC Unit. 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 HVAC Unit?
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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