What MFD capacitor do I need for my Carrier AC?

The correct replacement for Carrier model HC1CJX042000AAAA 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 HC1CJX042000AAAA.

My AC hums but will not start. What part do I need?

An AC that hums but will not start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost needed to start the compressor and fan motors. When it fails, you hear the hum of the motor trying to start but it cannot overcome inertia. Other symptoms include the fan spinning slowly, the AC cycling on and off rapidly, or a visibly swollen or leaking capacitor. Replacement cost: $15 to $80 for the part, DIY in 30 minutes.

Is this capacitor 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.

OEM Carrier Dual Run & Start Capacitor Kit for HC1CJX042000AAAA

Carrier

OEM Carrier Dual Run & Start Capacitor Kit for HC1CJX042000AAAA

Name: OEM Carrier Dual Run & Start Capacitor Kit for HC1CJX042000AAAA
Brand: Carrier
SKU: CARRIE-HC1CJX042000AAAA-CAPACITOR-P291-3574RS
Price: 39.00 USD
Availability: InStock

SKU: CARRIE-HC1CJX042000AAAA-CAPACITOR-P291-3574RS Brand: Carrier

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OEM Carrier Dual Run & Start Capacitor Kit for Model HC1CJX042000AAAA

This OEM capacitor kit includes both the dual run capacitor (P291-3574RS) and the start capacitor (P281-8806) factory-specified for the Carrier HC1CJX042000AAAA condenser unit. Capacitors store and release the electrical charge required to start and sustain the compressor and condenser fan motor. A failing dual run capacitor typically presents as a humming unit with no motor movement, while a failed start capacitor causes hard-start conditions, slow compressor startup, or repeated tripping of the breaker. Replacing both at once is the industry-recommended practice to restore full system reliability and avoid a second service call.

Specs: Kit includes P291-3574RS Dual Run Capacitor and P281-8806 Start Capacitor | Factory-matched MFD and voltage ratings | Round case construction | ±5% OEM tolerance for precise motor protection
OEM vs Generic: OEM capacitors are manufactured to exact Carrier factory tolerances, ensuring proper microfarad output under load. Aftermarket units commonly run ±10% MFD variance, which accelerates compressor wear, increases motor operating temperature, and can void equipment warranties.
Install Difficulty: 2/5 — Always discharge capacitors fully before handling — stored charge can cause serious injury. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter with capacitance setting. Photograph all wiring connections before disconnecting terminals. Turn off power at both the breaker and disconnect box before beginning.
Warranty & Shipping: Backed by a 1-year OEM factory warranty against defects. In stock and ships same business day from our climate-controlled warehouse — get your system back online fast.

Compatibility: This kit is engineered specifically for the Carrier HC1CJX042000AAAA condenser. Always verify the MFD rating, voltage rating, and terminal configuration printed on your existing capacitors or the unit data plate before ordering. If you're unsure of fitment, our HVAC parts specialists verify compatibility before your order ships — no guesswork required.

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 Dual Run & Start Cap...

$39.00

Frequently Asked Questions

Does this Capacitor fit my Carrier HC1CJX042000AAAA?

Yes. This is the factory-specified OEM capacitor for the Carrier HC1CJX042000AAAA. 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 capacitor on my Carrier HC1CJX042000AAAA?

Difficulty: Easy (20–30 min)
Step 1: Turn off power at breaker. Step 2: Open condensing unit panel. Step 3: Photograph the old capacitor wiring (Common/Herm/Fan). Step 4: Discharge old capacitor with insulated screwdriver. Step 5: Disconnect and remove old capacitor. Step 6: Mount new capacitor, reconnect wires to matching terminals. Step 7: Close panel, restore power, test. Tools: screwdriver, needle-nose pliers.

My AC hums but won’t start. What part do I need?

An AC that hums but won’t start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost to start the compressor. When it fails, you hear humming but the motor can’t overcome inertia. Other symptoms: fan spinning slowly, AC cycling on/off rapidly, or a visibly swollen capacitor. Fix: replace capacitor ($15–$80 DIY, 30 min).

Is this capacitor 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 capacitor?

OEM strongly recommended. OEM capacitors have ±6% MFD tolerance vs aftermarket ±10%. The looser tolerance causes motor winding stress, higher temps, and shorter compressor life. Price difference is only $10–$20 — OEM is the clear value choice.

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 Dual Run & Start Capacitor Kit for HC1CJX042000AAAA

OEM Carrier Dual Run & Start Capacitor Kit for Model HC1CJX042000AAAA

Shipping Information

Return Policy

Frequently Asked Questions