What amp contactor do I need for my Carrier system?

The correct replacement for Carrier model C4850C50AY04021 — Ships Today 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 C4850C50AY04021 — Ships Today.

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.

Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for C4850C50AY04021 — Ships Today

Name: OEM Carrier 40A Contactor 2-Pole 24V Coil for C4850C50AY04021 — Ships Today
Brand: Carrier
SKU: CARRIE-C4850C50AY04021-CONTACTOR-HN53CB115
Price: 31.20 USD
Availability: InStock

SKU: CARRIE-C4850C50AY04021-CONTACTOR-HN53CB115 Brand: Carrier

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OEM Carrier 2-Pole Contactor 24V Coil for Model C4850C50AY04021

This is the factory-specified OEM replacement contactor for the Carrier C4850C50AY04021 packaged unit. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when your thermostat calls for cooling, the contactor closes and sends line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an AC system hums but won't start, trips a breaker, or simply does nothing when the thermostat calls for cooling. Replaces OEM part numbers HN53CB115 and HN53HF122.

Specs: 2-Pole configuration | 24V control coil | 30–40A load rating | Heavy-duty silver-alloy contact tips | Direct OEM replacement for Carrier part numbers HN53CB115 and HN53HF122
OEM vs Generic: OEM contactors are manufactured to Carrier's exact coil pull-in voltage and contact gap specifications. Generic contactors often use lower-grade contact alloys that pit and arc faster, leading to premature failure — especially in high-cycle cooling climates.
Install Difficulty: 2/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. A straightforward swap for most experienced DIYers or service techs.
Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier C4850C50AY04021 packaged unit. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — no guesswork, no return hassles.

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

OEM Carrier 40A Contactor 2-Pole...

$31.20

Frequently Asked Questions

Does this Contactor fit my Carrier C4850C50AY04021 — Ships Today?

Yes. This is the factory-specified OEM contactor for the Carrier C4850C50AY04021 — Ships Today. 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 C4850C50AY04021 — Ships Today?

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 40A Contactor 2-Pole 24V Coil for C4850C50AY04021 — Ships Today

OEM Carrier 2-Pole Contactor 24V Coil for Model C4850C50AY04021

Shipping Information

Return Policy

Frequently Asked Questions