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Carrier

OEM Carrier Contactor CSA0550L5D Replacement Part for HVAC Unit

SKU: carrier-contactor-csa0550l5d 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 CSA0550L5D Replacement Part for HVAC Unit

The Carrier CSA0550L5D contactor is a genuine OEM power relay that delivers line voltage to your HVAC compressor and condenser fan when the system demands cooling. The coil energizes to close the contacts and start the outdoor unit, then opens to stop it when the call ends. Burned, corroded, or stuck contacts are a common source of no-cool service calls, loud buzzing, and intermittent operation — replacing the contactor fixes these issues quickly and affordably. This component is built specifically for Carrier model CSA0550L5D, ensuring the correct amperage, coil voltage, and pole configuration for an exact match. Installation is a moderate DIY repair: disconnect power at the service disconnect, photograph and label the wiring, move wires one at a time, and mount the new contactor in roughly 20 minutes. Always confirm power is off before handling any terminals. Made to genuine OEM standards for durable, consistent switching season after season. In stock and ships same-day when ordered before 3PM CST.

Compatibility

This part is compatible with Carrier model CSA0550L5D.

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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