What MFD capacitor do I need for my Goodman AC?

The correct replacement for Goodman model ADS80703AXA — B945672 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 Goodman equipment which lists the model number ADS80703AXA — B945672.

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 Goodman 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.

Goodman

OEM Goodman 12.5 MFD 370V Run Capacitor for ADS80703AXA — B945672

Name: OEM Goodman 12.5 MFD 370V Run Capacitor for ADS80703AXA — B945672
Brand: Goodman
SKU: B945672-GEN
Price: 22.95 USD
Availability: InStock

SKU: B945672-GEN Brand: Goodman

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The Goodman B945672 12.5 MFD 370V Run Capacitor is a genuine OEM replacement for ADS80703AXA furnaces. The run capacitor provides the phase shift that keeps the blower or fan motor running smoothly and efficiently. A weak or failed capacitor — common after years of heat cycling — causes hard starting, motor overheating, humming, or a blower that won't spin up. Replacing it is one of the most cost-effective HVAC repairs.

Specifications

Capacitance: 12.5 MFD (µF)
Voltage rating: 370 VAC
Type: Run capacitor
Fits: Goodman ADS80703AXA furnace
OEM Part Number: B945672
Brand: Goodman

OEM vs. Generic

This genuine Goodman capacitor is rated to exact factory capacitance and voltage with reliable internal construction. Generic capacitors at the same MFD/voltage will physically fit, but OEM units typically offer tighter tolerance and longer service life, reducing the chance of premature motor wear. A 370V or higher-rated 12.5 MFD capacitor is required.

Installation Difficulty

Easy to Moderate — disconnect power, discharge the old capacitor safely, note wire positions, and swap. Capacitors store a charge even when powered off — discharge before handling. If unsure, use a qualified technician.

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 Goodman 12.5 MFD 370V Run Ca...

$22.95

Frequently Asked Questions

Does this Capacitor fit my Goodman ADS80703AXA — B945672?

Yes. This is the factory-specified OEM capacitor for the Goodman ADS80703AXA — B945672. 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 Goodman ADS80703AXA — B945672?

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 Goodman 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 Goodman 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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