What MFD capacitor do I need for my Carrier AC?

The correct replacement for Carrier model CHA0400H2D 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 CHA0400H2D.

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.

Carrier

OEM Carrier Run & Start Capacitor Kit for CHA0400H2D

Name: OEM Carrier Run & Start Capacitor Kit for CHA0400H2D
Brand: Carrier
SKU: CARRIE-CHA0400H2D-CAPACITOR-P291-4504
Price: 25.00 USD
Availability: InStock

SKU: CARRIE-CHA0400H2D-CAPACITOR-P291-4504 Brand: Carrier

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

OEM Carrier Single Run & Start Capacitor Kit for Model CHA0400H2D

This OEM-matched capacitor kit includes both the single run capacitor (P291-4504) and the start capacitor (P281-1356) factory-specified for the Carrier CHA0400H2D condensing unit. The run capacitor maintains a steady phase-shifted current to keep the compressor and fan motor running efficiently, while the start capacitor delivers the high-torque burst of energy needed to get the compressor moving from a dead stop. When either component fails, symptoms typically include a humming compressor that won't start, repeated tripping of the breaker, hard-start hesitation, or a unit that runs briefly before shutting down on thermal overload.

Specs: P291-4504 — Single Run Capacitor, 440V rated, round case, ±5% MFD tolerance | P281-1356 — Start Capacitor, high-µF short-duty rating, factory-matched to CHA0400H2D compressor load requirements
OEM vs Generic: OEM capacitors are manufactured to exact factory tolerances, ensuring proper motor start torque and run efficiency. Generic alternatives often carry ±10% MFD variance, which can shorten compressor life and void equipment warranties.
Install difficulty: 2/5 — Always discharge capacitors fully before handling — they retain lethal voltage after power-off. Tools needed: insulated screwdriver, 1/4" nut driver, needle-nose pliers, multimeter with capacitance function. Photograph all wiring connections before removal.
Warranty: 1-year OEM factory warranty on both capacitors. Orders placed before cutoff ship the same business day from our climate-controlled warehouse.

Compatibility: Engineered as direct OEM replacements for the Carrier CHA0400H2D condensing unit. Always verify MFD ratings and voltage markings on your existing capacitors against your unit's data plate before installing. Replacing both the run and start capacitor at the same time is recommended by technicians to prevent a repeat service call — if one has failed, the other is under equal thermal stress. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you order. In stock — order now and ships today.

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 Run & Start Capacito...

$25.00

Frequently Asked Questions

Does this Capacitor fit my Carrier CHA0400H2D?

Yes. This is the factory-specified OEM capacitor for the Carrier CHA0400H2D. 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 CHA0400H2D?

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.

Menu

OEM Carrier Run & Start Capacitor Kit for CHA0400H2D

OEM Carrier Single Run & Start Capacitor Kit for Model CHA0400H2D

Shipping Information

Return Policy

Frequently Asked Questions