What amp contactor do I need for my Carrier system?

The correct replacement for Carrier model PH10JA02400GAHAA 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 PH10JA02400GAHAA.

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 24V Coil 2-Pole for PH10JA02400GAHAA

Name: OEM Carrier Contactor 24V Coil 2-Pole for PH10JA02400GAHAA
Brand: Carrier
SKU: CARRIE-PH10JA02400GAHAA-CONTACTOR-HN51KB024
Price: 31.20 USD
Availability: InStock

SKU: CARRIE-PH10JA02400GAHAA-CONTACTOR-HN51KB024 Brand: Carrier

✓ Guaranteed to fit PH10JA02400GAHAA — or your money back. Terms

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OEM Carrier Contactor 24V Coil 2-Pole for Model PH10JA02400GAHAA

This OEM contactor (part number HN51KB024) is the factory-specified high-voltage switching relay for the Carrier PH10JA02400GAHAA system. The contactor acts as the primary power switch between your 240V supply and the compressor and condenser fan motor — energized by a 24V signal from the control board each time your thermostat calls for cooling. When the contactor fails, the most common symptom is an outdoor unit that simply won't energize: you may hear the indoor air handler running, feel warm air at the vents, and find a buzzing or pitted contactor when you inspect the disconnect box.

Specs: 2-Pole design | 24V coil voltage | Factory-rated amperage matched to Carrier PH10JA02400GAHAA | OEM tolerance contacts for reduced arcing and extended service life
OEM vs Generic: This is a genuine OEM Carrier contactor. Generic aftermarket contactors frequently feature lower-grade contact tips that pit and weld faster under the high inrush current of a compressor start, leading to premature failure and potential compressor damage.
Install Difficulty: 2/5 — Always disconnect and lock out power at the disconnect box before beginning work. Tools needed: flat-head and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter to verify voltage. Photograph all wiring before disconnecting terminals.
Warranty: 1-year OEM factory warranty against defects. Orders placed before cut-off ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PH10JA02400GAHAA system. Always verify coil voltage and pole configuration on your unit's data plate before ordering to ensure correct fitment. Have a question about compatibility? Our HVAC parts specialists confirm fitment before you buy — no guesswork.

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 24V Coil 2...

$31.20

Frequently Asked Questions

Does this Contactor fit my Carrier PH10JA02400GAHAA?

Yes. This is the factory-specified OEM contactor for the Carrier PH10JA02400GAHAA. 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 PH10JA02400GAHAA?

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 24V Coil 2-Pole for PH10JA02400GAHAA

OEM Carrier Contactor 24V Coil 2-Pole for Model PH10JA02400GAHAA

Shipping Information

Return Policy

Frequently Asked Questions