What MFD capacitor do I need for my Carrier AC?

The correct replacement for Carrier model HA1BJX036000ADAA 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 HA1BJX036000ADAA.

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.

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OEM Carrier Dual Run & Start Capacitor Kit for HA1BJX036000ADAA

Name: OEM Carrier Dual Run & Start Capacitor Kit for HA1BJX036000ADAA
Brand: Carrier
SKU: CARRIE-HA1BJX036000ADAA-CAPACITOR-P291-3554RS
Price: 25.00 USD
Availability: InStock

SKU: CARRIE-HA1BJX036000ADAA-CAPACITOR-P291-3554RS Brand: Carrier

✓ Guaranteed to fit HA1BJX036000ADAA — or your money back. Terms

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OEM Carrier Dual Run & Start Capacitor Kit for Model HA1BJX036000ADAA

This factory-matched OEM capacitor kit contains both the dual run capacitor (P291-3554RS) and the start capacitor (P281-8806) for the Carrier HA1BJX036000ADAA split-system condenser. The dual run capacitor keeps the compressor and condenser fan motor running efficiently after startup, while the start capacitor delivers the extra torque needed to get the compressor spinning under load. When either unit degrades, symptoms include a loud humming with no motor movement, the system tripping the breaker, short-cycling within the first few minutes of operation, or complete failure to start. Replacing both capacitors together is best practice — a failing start capacitor stresses the dual run capacitor, and vice versa.

Specs: P291-3554RS — Dual Run Capacitor, factory-rated MFD & 370V/440V round case | P281-8806 — Start Capacitor, factory-rated MFD boost | ±5% OEM tolerance on both units | Verify exact MFD values on your unit's data plate before ordering
OEM vs Generic: OEM capacitors from Carrier are manufactured to exact tolerance specifications, ensuring proper motor starting torque and run efficiency. Generic alternatives often carry ±10% MFD variance, which increases heat buildup in windings and shortens compressor life prematurely.
Install Difficulty: 2/5 — Always disconnect power at the breaker and discharge the capacitor terminals before handling. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter (capacitance mode). Photograph all wiring connections before removal. The start capacitor may be mounted separately from the dual run — consult your wiring diagram.
Warranty & Shipping: Backed by a 1-year OEM factory warranty. In stock and ships same business day from our warehouse. Orders placed before 3 PM local time qualify for same-day dispatch.

Compatibility: This kit is specifically matched to the Carrier HA1BJX036000ADAA condenser unit. Always cross-reference OEM part numbers P291-3554RS and P281-8806 against your unit's data plate and wiring diagram to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — contact us anytime.

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...

$25.00

Frequently Asked Questions

Does this Capacitor fit my Carrier HA1BJX036000ADAA?

Yes. This is the factory-specified OEM capacitor for the Carrier HA1BJX036000ADAA. 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 HA1BJX036000ADAA?

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 HA1BJX036000ADAA

OEM Carrier Dual Run & Start Capacitor Kit for Model HA1BJX036000ADAA

Shipping Information

Return Policy

Frequently Asked Questions