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Carrier

OEM Carrier Contactor CSA0300M5D for Model CSA0300M5D

SKU: carrier-contactor-csa0300m5d Brand: Carrier
$34.95

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

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OEM Carrier Contactor CSA0300M5D for Model CSA0300M5D

The Carrier CSA0300M5D contactor is a genuine OEM electrical switch that controls power to the compressor and condenser fan motor in Carrier cooling equipment. Operated by a low-voltage control coil, it closes heavy-duty contacts when the thermostat calls for cooling and opens them to cut power once the demand is met. Built to Carrier's factory specifications, this contactor provides the precise voltage rating, contact amperage, and pole layout designed for model CSA0300M5D, eliminating the reliability and fit problems associated with generic universal contactors. Common signs of a failing contactor include a humming unit that won't start, short-cycling, and pitted or burnt contacts. The repair is straightforward for most technicians: shut off all power, transfer each wire one at a time to prevent errors, mount the new contactor, and reconnect. Most installs are completed in 20 to 30 minutes using basic hand tools, and checking voltage before energizing confirms a safe job. This OEM replacement restores dependable cooling performance and protects your compressor investment. In stock and ready to ship same-day on orders placed before 3PM CST.

Compatibility

This part is compatible with Carrier model CSA0300M5D.

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 CSA0300M5D?
Yes. This is the factory-specified OEM contactor for the Carrier Model CSA0300M5D. 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 CSA0300M5D?
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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