Sub-Zero Refrigerator Error Code ICE

Flashing ICE and SERVICE annunciators on a Sub-Zero tall unit mean the icemaker water inlet valve solenoid was detected as energized for more than 15 seconds during a fill cycle. This is a protective fault that disables the icemaker automatically. The most common triggers are a jammed ice cube, low water pressure, or a malfunctioning water inlet valve.

Start by checking the icemaker compartment for any jammed or bridged ice cubes and remove them. Next, verify that incoming water pressure is between 20 and 100 PSI using a pressure gauge at the supply line. If those check out, test the water inlet valve solenoid resistance with a multimeter; it should read approximately 160 ohms. Replace the valve if resistance is out of spec, then power cycle the unit to clear the fault.

Repair cost depends on the root cause. Clearing a jammed ice cube or adjusting water pressure costs nothing beyond a service call if a technician is needed. Replacing a faulty water inlet valve on a Sub-Zero typically runs anywhere from $150 to $400 or more depending on the specific model and labor rates in your area. Control board replacement, if required, will generally cost more.

Switching the unit OFF and then back ON will clear the ICE fault and re-enable the icemaker. However, if the root cause such as a jammed cube, low water pressure, or a faulty valve solenoid is not corrected, the error will return during the next fill cycle. Always diagnose and fix the underlying issue before resetting.

The ICE fault is a protective lockout designed to prevent flooding caused by a water valve that stays open too long. The icemaker is disabled automatically, so there is no immediate safety risk to the unit or your home as long as the fault is addressed promptly. You should still diagnose the cause soon to avoid water damage if the valve condition worsens.