The capacitor is located in the outdoor unit, mounted on or near the compressor
On a Goodman heat pump, the capacitor sits in the outdoor condensing unit, typically fastened to a metal bracket or the compressor itself. You will see it as a cylindrical or oval-shaped component about the size of a soda can, usually painted black or tan. It is one of the first parts you notice when you open the outdoor unit's access panel, positioned near the compressor motor and fan motor.
Most Goodman models have the capacitor mounted vertically on the side of the compressor or horizontally on a bracket above it. The exact placement varies slightly depending on your unit's model year and capacity, but it is always in the outdoor section—never inside your home. If you are looking at the indoor air handler, you will not find it there.
Key Takeaways
- The capacitor is always in the outdoor condensing unit, mounted near the compressor motor on a metal bracket or directly on the compressor housing.
- It looks like a cylindrical or oval metal can, typically black or tan, about 3 to 4 inches tall and 2 inches wide.
- Two or three wire terminals stick out from the top of the capacitor, and these connect to the compressor and fan motor.
- You can locate it without tools by opening the outdoor unit's access panel and looking for the largest cylindrical component near the compressor.
How to identify the capacitor by sight
The capacitor is unmistakable once you know what to look for. It is a metal cylinder or oval with a rounded top, and it stands upright or lies horizontally depending on the model. The surface is smooth and usually labeled with the capacitor's microfarad rating (µF)—common sizes on Goodman heat pumps are 35 µF, 45 µF, or dual capacitors rated 35+5 µF or 45+5 µF.
Three wire terminals protrude from the top of the capacitor, labeled C (common), H (herm, for hermetic compressor), and F (fan). These wires connect directly to the compressor motor and the outdoor fan motor. If you see a cylindrical part with these three terminals and no other wires running to it, that is your capacitor.
Opening the outdoor unit to locate it
To see the capacitor, you must open the outdoor unit's access panel. Turn off power to the heat pump at the breaker first—this is a safety step you cannot skip. The access panel is usually held on by four bolts or clips on the front or side of the outdoor unit.
Once the panel is open, look toward the back and bottom of the unit. The compressor is the largest component, and the capacitor sits when ready beside it or mounted on a bracket above it. You do not need to remove anything to see it; it is visible as soon as the panel comes off. If you see two cylindrical components stacked or side by side, you have a dual capacitor—both are doing the same job and are treated as one unit.
Why the capacitor location matters for maintenance
The outdoor location means the capacitor is exposed to heat, moisture, and temperature swings. This is why capacitors fail more often in heat pumps than in other appliances—they work hard during both heating and cooling cycles, and outdoor conditions wear them down faster. A failed capacitor usually means the compressor or fan motor will not start, even though the motor itself is fine.
Knowing where the capacitor sits helps you recognize a problem early. If the outdoor unit is running but the compressor is not turning on, or if the fan is not spinning, the capacitor is often the culprit. A technician will check this part first because it is the easiest and cheapest component to replace.
Accessing the capacitor safely
If you need to have the capacitor replaced or tested, always turn off power at the breaker before opening the outdoor unit. Even when power is off, a capacitor can hold an electrical charge. A technician will discharge it with a screwdriver before touching it—do not attempt this yourself.
The capacitor is held in place by a single bolt or clip, so removal is straightforward for a professional. The wire terminals straightforward unplug from the compressor and fan motor. If you are having work done, ask the technician to show you the old capacitor and explain why it failed; this helps you understand whether the failure was normal wear or a sign of a larger problem.
Common mistakes when looking for the capacitor
The most common mistake is looking in the indoor air handler. The capacitor is never inside your home—it is always in the outdoor unit. Some homeowners confuse the capacitor with the contactor, which is a relay switch that looks similar but sits in a different location and has a different function.
Another mistake is assuming the capacitor is the only cylindrical part in the outdoor unit. The compressor itself is cylindrical, and so are some refrigerant lines. The capacitor is distinguished by its three wire terminals and its position directly next to the compressor motor. If you are unsure, take a photo and show it to a technician before touching anything.
Frequently Asked Questions
Can I replace the capacitor myself?
Capacitor replacement requires turning off power, discharging the capacitor safely, and matching the exact microfarad rating of the old part. If you are comfortable with basic electrical work and have a multimeter, you can do it, but most homeowners should hire a technician. The cost of a service call is usually less than the cost of a burned-out compressor if something goes wrong.
What does a bad capacitor look like?
A failed capacitor often bulges or leaks at the top, or the metal casing may be cracked or scorched. Sometimes there is no visible damage, and the only sign is that the compressor or fan will not start. A technician uses a multimeter to test whether the capacitor is holding a charge; visual inspection alone is not reliable.
How long do Goodman heat pump capacitors last?
Most capacitors last 10 to 15 years, though outdoor heat and humidity can shorten that to 5 to 10 years in hot climates. If your heat pump is more than 10 years old and the compressor or fan is not starting, the capacitor is often the first thing to replace.
Is the capacitor the same on all Goodman models?
No. Different models and sizes use different microfarad ratings. Always match the exact rating of the old capacitor when ordering a replacement. The rating is printed on the side of the capacitor and also listed in your unit's documentation.
What happens if the capacitor fails?
A failed capacitor prevents the compressor or fan motor from starting, so your heat pump will not heat or cool. The motor itself is usually fine; replacing the capacitor restores normal operation. If the capacitor fails repeatedly, it may signal a problem with the motor or electrical circuit that a technician should investigate.