Same-day shipping on orders before 3PM CST · 15,000+ OEM Parts In Stock · Carrier · Bryant · ICP · Heil · Tempstar
Track Order | 1-800-NHP-HVAC | Trade Accounts

Menu

Home Shop All Account Cart
Home / OEM Carrier Contactor COA0300M5D Genu...

IMAGE COMING SOON

Carrier

OEM Carrier Contactor COA0300M5D Genuine HVAC Replacement Part

SKU: carrier-contactor-coa0300m5d Brand: Carrier
$39.95

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

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

OEM Carrier Contactor COA0300M5D Genuine HVAC Replacement Part

Bring your Carrier outdoor unit back online with the genuine OEM contactor COA0300M5D. This definite-purpose contactor switches high-voltage power to the compressor and condenser fan, engaging every time the thermostat signals for cooling. Built to factory specifications, it provides crisp, reliable contact closure and stands up to the constant on-off cycling that wears out lesser aftermarket parts. The COA0300M5D is designed expressly for Carrier model COA0300M5D, guaranteeing a drop-in fit with the correct coil voltage, amperage rating, and terminal arrangement. The install is a moderate, DIY-friendly job: disconnect power at the service switch, photograph the wiring for reference, transfer each wire to the matching terminal, then mount and secure the new unit. Most do-it-yourselfers wrap up in 20 to 30 minutes, though hiring a licensed HVAC pro is always the safest choice. Order before 3PM CST for same-day shipping. Don't let a worn contactor leave you without cooling — install genuine Carrier OEM and restore dependable performance with confidence.

Compatibility

This part is compatible with Carrier model COA0300M5D.

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 OEM Carrier Contactor COA0300M5D Genuine HVAC Replacement Part?
Yes. This is the factory-specified OEM contactor for the Carrier OEM Carrier Contactor COA0300M5D Genuine HVAC Replacement Part. 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 OEM Carrier Contactor COA0300M5D Genuine HVAC Replacement Part?
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.
Home Shop Search Account Cart