What amp contactor do I need for my Carrier system?

The correct replacement for Carrier model C4850C50ZN040900 | National HVAC Parts 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 C4850C50ZN040900 | National HVAC Parts.

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 2-Pole 24V Coil for C4850C50ZN040900 | National HVAC Parts

Name: OEM Carrier Contactor 2-Pole 24V Coil for C4850C50ZN040900 | National HVAC Parts
Brand: Carrier
SKU: CARRIE-C4850C50ZN040900-CONTACTOR-HN53CB115
Price: 31.20 USD
Availability: InStock

SKU: CARRIE-C4850C50ZN040900-CONTACTOR-HN53CB115 Brand: Carrier

✓ Guaranteed to fit — or your money back. Terms

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OEM Carrier 2-Pole Contactor 24V Coil for Model C4850C50ZN040900

This OEM replacement contactor is the factory-specified high-voltage relay for the Carrier C4850C50ZN040900 packaged unit. The contactor acts as the main switching component that closes the high-voltage circuit to the compressor and condenser fan motor when your thermostat calls for cooling. When the contactor fails — due to pitted or welded contacts, a burned coil, or a weak pull-in — your system will either refuse to start entirely, run continuously without shutting off, or trip the breaker repeatedly. Replacing the contactor is one of the most common and cost-effective repairs in HVAC service. OEM part numbers HN53CB115 and HN53HF122 are both factory-authorized replacements for this application.

Specs: 2-pole configuration | 24V control coil | High-amperage load contacts rated for compressor and fan duty | Direct OEM drop-in replacement — no wiring modifications required
OEM vs Generic: OEM contactors feature factory-matched contact material and coil pull-in voltage tolerances. Generic units often use lower-grade contact alloys that pit faster under load cycling, shortening service life significantly in high-duty applications like packaged rooftop units.
Install difficulty: 3/5 — Disconnect and lock out power at the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Terminals are line-side (L1/L2) and load-side (T1/T2) — correct orientation is critical.
Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed for the Carrier C4850C50ZN040900 packaged unit. Verify coil voltage (24V) and pole configuration against your unit's wiring diagram and data plate before ordering. Replaces OEM part numbers HN53CB115 and HN53HF122. Our fitment team is available to confirm compatibility before you order — reach out via chat or phone.

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 $99
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 info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Carrier Contactor 2-Pole 24V...

$31.20

Frequently Asked Questions

Does this Contactor fit my Carrier C4850C50ZN040900 | National HVAC Parts?

Yes. This is the factory-specified OEM contactor for the Carrier C4850C50ZN040900 | National HVAC Parts. 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 C4850C50ZN040900 | National HVAC Parts?

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 2-Pole 24V Coil for C4850C50ZN040900 | National HVAC Parts

OEM Carrier 2-Pole Contactor 24V Coil for Model C4850C50ZN040900

Shipping Information

Return Policy

Frequently Asked Questions