Ice O Matic 9181009-11 Capacitor

What this capacitor does

Capacitors store and release electrical energy to support electric motors. They help motors start up and maintain steady performance while running.

A dual run capacitor powers two motors from one can and has three terminals labeled HERM, FAN, and C. A single run capacitor has two terminals. When a capacitor weakens or stops working, the motor may hum loudly or fail to turn.

Understanding the 9181009-11 specs

Every capacitor has precise electrical and physical ratings printed on its label. Matching these exact values is necessary for proper fit and safe operation.

The ratings for part number 9181009-11 are listed below:

• Capacitance: 25.0uF
• Voltage: 370V
• Frequency: 50/60HZ
• Length: 3.4 in / 8.64 cm
• Width: 1.75 in / 4.45 cm
• Height: 1.75 in / 4.45 cm

How to confirm a replacement matches

When matching a replacement capacitor, the capacitance rating must be the same as the old part. The microfarad rating, written as µF, MFD, or uF, must match what your equipment requires.

The voltage rating on a replacement must be the same or higher. For example, a 440 V capacitor can replace a 370 V capacitor, but a 370 V capacitor can never replace a 440 V one. Round and oval capacitors with the same ratings do the same job, so pick the shape that fits your mounting bracket.

Signs of failure and safe replacement steps

A common sign of a failed capacitor is a motor or fan that hums but will not spin. Homeowners sometimes assume the motor has failed when the capacitor is the real issue.

If you decide to handle the replacement yourself, work slowly and follow standard safety practices.

1. Turn off the power at the main breaker and pull the outdoor disconnect.
2. Test with a meter to verify that all electrical power is completely off.
3. Discharge the capacitor terminals using an insulated tool before touching anything.
4. Take a clear photo of every wire connection to remember the exact layout.
5. Disconnect the wires and remove the old capacitor from its mounting bracket.
6. Mount the new capacitor and move wires one at a time to the matching terminals shown in your photo.

Read your old part

1. Turn off electrical power and safely discharge the old capacitor.
2. Read the label printed directly on your old part.
3. Confirm that the part number reads 9181009-11.
4. Check that the capacitance rating reads 25.0uF.
5. Verify the voltage rating is 370V and frequency is 50/60HZ.
6. Measure the physical dimensions to ensure it fits the mounting bracket.