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OEM Carrier Single Run Capacitor Kit 4+15 MFD 370V — PY1REA048074AAWB
Carrier

OEM Carrier Single Run Capacitor Kit 4+15 MFD 370V — PY1REA048074AAWB

SKU: CARRIE-PY1REA048074AAWB-CAPACITOR-P291-0403 Brand: Carrier
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Texas CMBL #19328542014
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OEM Carrier Single Run Capacitor Kit 4 MFD + 15 MFD 370V for Model PY1REA048074AAWB

This OEM-matched single run capacitor kit contains both factory-specified capacitors for the Carrier PY1REA048074AAWB 4-ton single-package rooftop gas/electric unit. Part number P291-0403 (4 MFD 370V) serves the condenser fan motor circuit, while P291-1503 (15 MFD 370V) supports the compressor run circuit. Unlike a dual run capacitor, these packaged rooftop units use two discrete oval single run capacitors — one per motor. When either capacitor weakens or fails, you'll see symptoms like a condenser fan that hums but won't spin, a compressor that short-cycles, or a unit that trips on thermal overload within minutes of startup.

  • Specs — P291-0403: 4 MFD (microfarad) | 370 VAC | Oval case | ±6% tolerance | 50/60 Hz | Replaces HC90AA004, HC91CA004, 97F5704
  • Specs — P291-1503: 15 MFD (microfarad) | 370 VAC | Oval case | ±6% tolerance | 50/60 Hz | Replaces HC90AA015, HC91CA015, HC90AB015
  • OEM vs Generic: Carrier sources these capacitors from Totaline/Genteq — the OEM-branded versions carry tighter tolerances and are tested to 60,000 service hours. Generic capacitors may run ±10% MFD, accelerating motor wear on your packaged unit's compressor and fan motor over time.
  • Install difficulty: 2/5 — Disconnect and lock out power at the rooftop disconnect before accessing the electrical compartment. Always discharge capacitors with a resistor before touching terminals. Tools needed: 1/4" nut driver, needle-nose pliers, multimeter with capacitance function. Photograph all wiring before disconnecting terminals.
  • Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY1REA048074AAWB 4-ton packaged rooftop gas/electric unit. Verify both MFD ratings and the 370V voltage rating on your unit's data plate before ordering — do not substitute a higher MFD rating on the fan motor circuit. Questions about fitment? Our HVAC parts specialists verify compatibility before you order. In stock and ready to ship 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 $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 OEM Carrier Single Run Capacitor Kit 4+15 MFD 370V — PY1REA048074AAWB?
Yes. This is the factory-specified OEM capacitor for the Carrier OEM Carrier Single Run Capacitor Kit 4+15 MFD 370V — PY1REA048074AAWB. 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 OEM Carrier Single Run Capacitor Kit 4+15 MFD 370V — PY1REA048074AAWB?
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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