What amp contactor do I need for my Carrier system?

The correct replacement for Carrier model Model C4850C50AW03521 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number Model C4850C50AW03521.

My AC clicks but the compressor does not turn on. What is wrong?

Clicking from the outdoor unit without the compressor starting usually means a worn contactor. The contactor is the relay that sends power to the compressor. When its contacts are pitted or worn, it clicks but cannot establish a solid electrical connection. Other symptoms: visible pitting or burn marks on the contactor face, AC works intermittently, or buzzing from the contactor.

Is this contactor compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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OEM Carrier Contactor C4850C50AW03521 for Model C4850C50AW03521

Name: OEM Carrier Contactor C4850C50AW03521 for Model C4850C50AW03521
Brand: Carrier
SKU: carrier-contactor-c4850c50aw03521
Price: 54.95 USD
Availability: InStock

SKU: carrier-contactor-c4850c50aw03521 Brand: Carrier

$54.95

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

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30-Day Returns

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OEM Carrier Contactor C4850C50AW03521 for Model C4850C50AW03521

This authentic OEM Carrier contactor (C4850C50AW03521) is the magnetic switch that controls power to your compressor and condenser fan motor each time your thermostat calls for cooling. Produced to Carrier's exact factory specifications, it ensures solid contact closure, quiet coil operation, and dependable performance through thousands of high-inrush cycles without arcing or premature wear. Engineered as a direct-fit replacement for Carrier model C4850C50AW03521, it matches the original coil voltage, pole configuration, and contact rating so installation requires no rewiring or adapters. The replacement is a moderate task that an HVAC technician or careful homeowner can handle: disconnect power at the unit, photograph and label the wiring, move the leads to the new contactor one at a time, and secure it in place. Most jobs take under 30 minutes. A fresh contactor eliminates chatter, welded contacts, and unreliable starts while protecting costly downstream components. In stock and ships same-day when ordered before 3PM CST.

Compatibility

This part is compatible with Carrier model C4850C50AW03521.

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 C4850C50AW03521?

Yes. This is the factory-specified OEM contactor for the Carrier Model C4850C50AW03521. 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 C4850C50AW03521?

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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OEM Carrier Contactor C4850C50AW03521 for Model C4850C50AW03521

OEM Carrier Contactor C4850C50AW03521 for Model C4850C50AW03521

Compatibility

Shipping

Shipping Information

Return Policy

Frequently Asked Questions