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Carrier

OEM Carrier Contactor CSA0300L5D for Model CSA0300L5D

SKU: carrier-contactor-csa0300l5d 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 CSA0300L5D for Model CSA0300L5D

The Carrier CSA0300L5D contactor is a genuine OEM electrical switch that routes power to the compressor and condenser fan motor in Carrier cooling units. When the thermostat signals for cooling, the contactor's low-voltage coil pulls its heavy-duty contacts closed to deliver line voltage to these high-amperage components, then opens them to stop power flow at the end of the cycle. Built to Carrier's original factory specifications, this contactor supplies the exact coil voltage, contact rating, and pole arrangement that model CSA0300L5D requires, preventing the contact welding and short service life common with universal replacements. Indicators of a failing contactor include a unit that hums but won't start, short-cycling, and visibly pitted or scorched contacts. Replacing it is a manageable repair for most technicians: turn off all power, transfer each wire individually using a reference photo, secure the new contactor, and reconnect the leads. Most installs take 20 to 30 minutes with basic hand tools, and a voltage check before startup ensures safety. This OEM part restores dependable cooling. In stock and shipping same-day on orders before 3PM CST.

Compatibility

This part is compatible with Carrier model CSA0300L5D.

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 CSA0300L5D?
Yes. This is the factory-specified OEM contactor for the Carrier Model CSA0300L5D. 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 CSA0300L5D?
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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