What MFD capacitor do I need for my Carrier AC?

The correct replacement for Carrier model PG8MAA042090ADJA Gas Furnace 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 PG8MAA042090ADJA Gas Furnace.

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 Dual 10 MFD Run Capacitor for PG8MAA042090ADJA Gas Furnace

Name: OEM Carrier Dual 10 MFD Run Capacitor for PG8MAA042090ADJA Gas Furnace
Brand: Carrier
SKU: CARRIE-PG8MAA042090ADJA-CAPACITOR-P291-1003
Price: 56.95 USD
Availability: InStock

SKU: CARRIE-PG8MAA042090ADJA-CAPACITOR-P291-1003 Brand: Carrier

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OEM Carrier Dual Run Capacitor for PG8MAA042090ADJA Gas Furnace

The run capacitor gives your Carrier PG8MAA042090ADJA furnace blower motor the phase-shifted jolt it needs to start and run smoothly. As it weakens, the blower struggles: you may hear a low hum with no fan spinning, notice weak airflow from the registers, smell hot motor windings, or trip the breaker. A bulged, leaking, or swollen-top capacitor is a sure sign — they fail more often than any other furnace component. Capacitors are rated in microfarads (MFD/µF) and voltage — commonly a single or dual round can in the 5-10 µF range at 370 or 440 VAC for a furnace blower motor. Always match the MFD exactly and use a voltage rating equal to or higher than the original. OEM capacitors hold a tight ±5% tolerance, so a 7.5 µF can actually delivers 7.5 µF. Verify the exact rating stamped on your old cap or the blower motor before ordering. Why OEM matters: capacitance is everything for a motor. Generic caps often carry ±10-15% tolerance, so a 'matching' part can run well off-value, pushing the blower motor windings to overheat, lose torque, and fail years early. A correct OEM-tolerance capacitor keeps the motor cool, efficient, and quiet. Install difficulty: 2 of 5. Tools: 1/4" nut driver, needle-nose pliers, and a multimeter with capacitance mode to confirm the new value. #1 safety warning: a charged capacitor can hold a dangerous shock — kill the furnace breaker and fully discharge the capacitor across its terminals with an insulated resistor before touching it. Ships same business day from our stocked warehouse on orders before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.

Compatibility

This part is compatible with Carrier model PG8MAA042090ADJA. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

OEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.

Shipping & Returns

Same-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.

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 10 MFD Run Capa...

$56.95

Frequently Asked Questions

Does this Capacitor fit my Carrier PG8MAA042090ADJA Gas Furnace?

Yes. This is the factory-specified OEM capacitor for the Carrier PG8MAA042090ADJA Gas Furnace. 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 PG8MAA042090ADJA Gas Furnace?

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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