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OEM Carrier Dual Run Capacitor P291-3574RS for HB1BJX042000AAAA
Carrier

OEM Carrier Dual Run Capacitor P291-3574RS for HB1BJX042000AAAA

SKU: CARRIE-HB1BJX042000AAAA-CAPACITOR-P291-3574RS Brand: Carrier
✓ Guaranteed to fit HB1BJX042000AAAA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Dual Run Capacitor P291-3574RS for Model HB1BJX042000AAAA

This OEM dual run capacitor (part number P291-3574RS) is the factory-specified replacement for the Carrier HB1BJX042000AAAA split-system air conditioner. The dual run capacitor stores and releases the precise electrical charge needed to start and continuously run both the compressor and condenser fan motor. When this component begins to fail, common symptoms include an audible hum with no motor movement, a compressor that kicks on briefly then shuts off, warm air from vents despite the system appearing to run, or a condenser fan that spins only when manually assisted. Left unaddressed, a failing capacitor places significant strain on the compressor — one of the most expensive components in the system.

  • Specs: OEM part number P291-3574RS | Dual run configuration (compressor + fan) | Factory-matched MFD rating and voltage (370V/440V) | Round case design | ±5% tolerance per OEM specification
  • OEM vs Generic: This is a genuine Carrier OEM capacitor, manufactured to exact factory tolerances. Aftermarket alternatives frequently deviate by ±10% or more in MFD rating, accelerating wear on the compressor and fan motor and potentially voiding equipment warranties.
  • Install Difficulty: 2/5 — Always discharge the capacitor fully before removing any terminals — capacitors hold lethal voltage even after power is disconnected. Recommended tools: 1/4" nut driver, insulated needle-nose pliers, and a multimeter with capacitance testing. Photograph all wiring connections before disconnecting.
  • Warranty: Backed by a 1-year OEM factory warranty. In-stock units ship same business day from our HVAC-dedicated warehouse.

Compatibility: Designed and tested for the Carrier HB1BJX042000AAAA condensing unit. Always verify the MFD rating and voltage on your existing capacitor's label or the unit's data plate before ordering to ensure an exact match. Our parts specialists are available to confirm fitment before you buy — no guesswork required. Order today for same-day shipping and get your system back up and running fast.

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

Frequently Asked Questions

Does this Capacitor fit my Carrier HB1BJX042000AAAA?
Yes. This is the factory-specified OEM capacitor for the Carrier HB1BJX042000AAAA. 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 HB1BJX042000AAAA?
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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