Ice O Matic 9181010-10 Relay Reference

What the Relay Does

The compressor pump requires a quick burst of power to start turning against internal pressure. A start relay controls that initial circuit connection.

A relay is a small switch run by a low voltage coil. In timed circuits, a delay timer waits a few minutes before it lets the compressor restart. This pause protects equipment from starting under high head pressure.

Understanding the Part Specs

If you hold an old part labeled 9181010-10, check its stamped electrical ratings and physical measurements against the listed specs.

• Current rating: 35A
• Voltage rating: 400VAC
• Length: 2.25 in / 5.72 cm
• Width: 1.95 in / 4.95 cm
• Height: 1.6 in / 4.06 cm

Matching a Replacement Relay

Electric ratings must line up precisely to prevent motor failure or electrical shorts.

Always confirm these core relay match rules before installation:

• Coil volts: must be the same.
• Action: same contacts, like SPDT or DPDT.
• Amps or delay: same or higher rating, same delay.

How to Replace the Relay Safely

Relays experience electrical wear over time. If a relay fails, the compressor may fail to start or hum without turning on.

Follow these steps to complete a safe swap once you confirm power is disconnected:

1. Shut off power at the main breaker panel and verify zero voltage with an electrical tester.
2. Take a clear photo of every wire connected to the old relay to record terminal locations.
3. Disconnect the old relay and move wires one at a time to the same spots on the new part.
4. Secure the relay mounting bracket and restore power to test system operation.

Read your old part

1. Locate the identification sticker or stamped text on your existing relay body.
2. Check that the part number reads 9181010-10.
3. Verify the electrical rating shows 35A and 400VAC.
4. Confirm the physical size matches 2.25 in / 5.72 cm length, 1.95 in / 4.95 cm width, and 1.6 in / 4.06 cm height.