Sub-Zero Error Code 30

Sub-Zero code 30 means the ice-maker water valve stayed energized too long, too often (over 15 seconds, five times) — usually a fill problem: a stuck valve, low/again water supply, or a fill-tube/icemaker fault. We confirm water supply and the valve before replacing parts.

Likely causes

• Stuck or failing water inlet valve
• Restricted/frozen fill tube or low water pressure
• Ice-maker module fault

What you can safely check first

• Confirm the saddle valve/supply is open and not kinked
• Check for a frozen fill tube
• Record companion codes

When to call a technician in Oakland

If the code returns after the basic checks, or it involves the thermistor, defrost, compressor or control board, it needs proper diagnosis. We repair coded Sub-Zero faults across Oakland & the East Bay — same-day when the schedule allows, with a 365-day warranty on parts and labor. Call (650) 668-1554, or see Sub-Zero refrigerator repair and how to read codes in service mode.